Advanced Email Personalization Using Mailjet’s API

In our previous post in this series e explained what personalization is and provided some useful tips on how and when to best add personalization to your campaigns. We also showed you how to apply standard personalization either manually or using our awesome email builder – Passport. If you missed it be sure to check out our previous article here.

In this article, we are going to dive even deeper into the world of the personalization. Do you want to know how to get to the next level? ? Keep reading and you will see the magic of the advanced personalization, which will allow you to create the perfect email for everyone.

What is advanced email personalization?

Advanced personalization is the easiest way to customize your emails with data that it is collected by your CRM or any other tool you are using to collect your customer’s information. At the moment, this type of personalization e can only be used for transactional emails at Mailjet and by using our template language.

While advanced personalization allows you to do everything we covered in standard personalization, it goes well beyond that.. Not only can you customize [first name] and other basic variables, with advanced personalization,you can customize the content of your email as well, allowing you to send fully personalized emails.. We’ll show you a little later on how exactly you can do this but first to do any kind of personalization you will need personal data for your clients to use.

What data can you use to personalize your email?

The most basic method of collecting information is through a subscription widget You can ask your customers and prospect any number of qualifying questions as they are subscribing to your emails, or opening an account. Starting with their name and email of course, all the way to questions that are going to help you provide a truly personal experience in your campaigns.

For example, if you are selling tickets for events, you could ask “What type of music do you like?” or “What type of movies do you like to watch?” or maybe “Do you prefer live music or live theater?”. get a better idea what to propose to each customer.

But are there other ways to collect data from your customers without asking them additional questions all the time? Yes, you can collect the data for advanced personalization using behavioral website tracking or integrations.

Behavior website tracking

Using behavior website tracking you would have the ability to collect more data than you would ever need about your website visitors using conversion rate optimization (CRO) tools.

User behavior are the activities that your visitors are doing after they land on your site. It could be clicks, scrolling through pages, reading blog posts, taking quizzes, and anything else you think will be useful to you. This could be really helpful at any time of the year,or example if you are tracking that Mike is browsing for items for his wife Laura and his 5 year old boy Jake, you can send him an email with suggestions for the perfect presents for his family.

Integrations

Another good option would be to use integrations. Get subscriber data such as past orders, total money spent, location, purchase data,and more, by integrating your email marketing tool with your CRM or e-commerce platform. There are a lot of integrations that could do all the work for you and you will just have to create the basic template, all the rest will be done automatically. So, at the end your recipient will get a perfect personalized email. For example if you are using our integration with Mautic, you could create a preference center using their how-to article.

Okay, now we have all the data that we need for our emails. Let’s see how to use it with our advanced personalization option.

How to use Advanced Personalization?

When it comes to personalized content, how you can decide which part of the content to be shown to specific targets? When the emails speak to what the subscriber wants to read about, your customers are much more likely to engage with them. Hence, you need to be sure that you offer email content that are targeted and relevant to the recipient. Now that you have all the data and segments set, create emails that are most suited and targeted for each individual subscriber.

Dynamic content is something that you can easily do with the our advanced personalization or the so called template language via our API. You can easily mix up the simple and the advanced personalization in one template, so you would have one beautiful email at the end.

What is the difference between both types? As we saw, standard personalization is taking the information from the data you provided while uploading your list at Mailjet, so we already have this information on our side.

But advanced personalization is actually asking your systems about the information that we should display in the email. In the API call you are going to set up the properties and configure the path to the destination from where the API call should take them.

There is a slight difference also in the way the both type of personalizations are being set up. If you are creating your template in Passport to use the standard personalization, you can use the way described in our previous article, or manually by typing:

{{data:nameoftheproperty:”defaultvalue”}}

The advanced personalization could be set up by manually typing the following syntax:

{{var:nameoftheproperty:”defaultvalue”}}

As you can see the only difference is in the type of variable – one is data and the other is var. You can add it in this way in Passport or in any MJML/HTML template you are creating.

The way you should define those properties in your API calls, depends on the API version you are using.

  • In Send API v3.1 you should do it with the following piece of code:
"Variables": {
              "day": "Monday"
}
  • In Send API v3 the code is:
"Vars":{"day":"Monday"}

In the API call you can set up the path to the destination from which the variable should be taken. Our system will call this destination and replace the property with the value your system sends us.

Using Dynamic Content to Personalize Emails

One of the useful features of the template language is the dynamic content. Using conditions and loops, you can show part of your content only to the recipients you want.

You won’t recommend Mike buy his wife Laura men’s shoes right? Or his son a kitchen dining set?

We know that you can create such dynamic content using HTML without any issue, but now this is possible with Passport as well. Simply drag and drop the template language section wherever you want within the template, like shown below:

Templating-Language-section

You can create any condition, or loop where the content can be shown to each of your segments. You can also use any information that you have saved in your CRM or database. For example age, gender, city, or interests. If you are using behavioral website tracking, this could also be used as source of information.

Another option would be to segment a whole section using Passport. To do this, you will need to select the section you want, and in the upper left corner you will have the option to add a property and segment based on it.

template-language-block

Click on “Add condition” and configure the right option for your specific use case. You can choose whether the property should be equal to a specific term, or greater than a value, or less than any value you choose.

template-language-condition

You can find everything you need on how to use the dynamic content with our template language in this article.

Personalizing the content and copy of the email boosts engagement and loyalty. Sending tailor-made and relevant content increases the click-through rates of your emails. By dynamically changing content, you will be able to send the most relevant emails to every subscriber. They will see offers and products that they are more likely to be interested in, thereby increasing the likelihood of a purchase.

What can you add as dynamic content? Almost anything! Here are some ideas to get you started:

  • VIP Loyalty section – categorize your subscribers based on their purchases and send specially tailored offers and discounts to them. This will help your brand engage customers stronger and drive revenue.
  • Recommendations – when you send recommendations based on a recent purchase, there is an increased chance of them purchasing the recommended products.
  • Wish Lists – you have an item that a customer added in their wish list? Add this as a reminder in the next email you are sending them. They might still want it.
  • Abandoned Carts – someone left behind an item in their cart? Remind them about how awesome that product is, hey they may still want it. You can see how to code abandoned cart emails using MJML in our tutorial.
  • Birthday/Anniversary discounts – what better way to celebrate a birthday than by providing them a discount? You can do the same when someone has been with you for a month, a year, or any anniversary worth celebrating.

Summing Up

The best part is that all of this can easily be done with our email builder Passport! And you will only need to define the variables you used for the advanced personalization in your API call.

You can create one template that full of variables, but everyone of your subscribers will receive an email that is perfectly customized for them. Don’t waste your time with different templates for all your customers You can easily have one template that will adapt to the customer.
With the strategies listed above, you can set up a winning personalized email strategy for your business. Your customers receive dozens of emails everyday, so your email needs to stand out. Personalization can do this for you! Try it out and see how your emails can build stronger relationships between your brand and your customers.

If you want to be the first to know everything new about how to create great emails or use Mailjet in the best way, just follow us on Twitter and Facebook!

How to Personalize Your Emails with Mailjet

Email personalization is a tactic used by a lot of brands today, but frankly not enough. We do it… do you? 😉Of course, there are good reasons for this. Personalized emails are much more likely to be opened and clicked, because in a endless feed of content, those messages tailored made for you are much more attractive. In fact, as you’ll see below, simply including a name in the subject line will increase open rates by 20%, boost sales leads by 31%, and reduce unsubscribes by 17%

In this article, we will dig deeper into:

  • Effective ways to personalize your emails.
  • Why using personalization in emails is important.
  • How to use Mailjet to personalize your emails.

 

When you look at the full benefits of email personalization, this is just the tip of the iceberg though.

What is email personalization?

When it comes to email, personalization means leveraging the information you collected about a customer to target their interests and personal attributes. It could be something as simple as using their first name, where they live, something they bought recently, or perhaps something based on their behaviour on your site like downloading content or saving an item in a check out cart.

In short, email personalization can help you:

  • Customize an email subject line to stand out in the inbox;
  • Increase the likelihood of an email being opened and clicked on, when the personalized content is previewed within the inbox;
  • Improve customer experience by sending the right content to the right person at the right time.

Why should you personalize your emails?

We’re sure that by now you’ve already received your fair share of emails with your name in the subject line. Well, something as simple as adding the contact’s name in the subject line can mean a 20% higher chance of getting your email opened.

And now if you receive an email with the subject “Hey Sarah! Find the perfect gift for you and your friends!”, wouldn’t you be interested?

But customizing the subject line is just the first step. Personalization allows you to tailor email content so the reader feels it has been handpicked for them. Personalized email messages improve click-through rates by an average of 14% and conversions by 10%.

As we predicted earlier this month, 2019 will be the year in which brands finally fully embrace relevant messages. Segmented and targeted emails could actually generate more revenue for you and your brand, so can you really afford to continue to neglect email personalization?

What do you need before you start using personalization?

To start personalizing your emails, you’ll obviously need to collect the relevant data from your subscribers, users, and customers. Any data that gives you deppers insights about an individual can be used, from their date of birth, to their city, to their cat’s name. The more information you collect, the more targeted your email campaigns can be. You can collect this data using signup forms and subscription widgets when people create an account or subscribe to your email list, as well as tracking behavioural data such as which links they click in your emails or website actions.

With signup forms and subscription widgets, apart from the standard name and email address information, you can collect extra data such as gender, location, birthday, etc. Capturing extra details helps you in creating more personalized and targeted emails.

How to add personalization to your emails using Mailjet

Mailjet offers standard (simple) personalization that can be easily used thanks to contact properties on Mailjet’s platform. This can be used directly on our email editor, Passport, without having to make any API calls to define the values. Standard personalization can be used on both marketing and transactional emails and can help you when you already have all the data you need stored as part of your contact properties. But what if you don’t?

Well, then there is the option of advanced personalization that could be used through Mailjet’s Email API if you have these values as properties in your CRM. This type of personalization can only be used on transactional emails. We will talk more about that in a future article. :-)

To use standard personalization, however, you just need two things:

  • All the variables already set up as contact properties, and added into your Mailjet account.
  • An amazing guide to learn how to set up the variables in your template (like this post? 😎).

If you need help creating and adding properties, click here.

So, what can we do with simple personalization? Almost anything we want, if the all the necessary information is uploaded to, or integrated with, Mailjet. You can personalize subject lines and content within the email with predefined values, such as your contact’s cat name (we’ll keep pushing this idea until someone uses it 😼)or the city they were born in.

How to personalize your emails using Mailjet’s Passport

Using personalization with our email editor, Passport, is really easy. Once you have your beautiful template ready, it will only take a few minutes to add in all the necessary variables. You will not need deep technical knowledge on how to code, or use any strange Klingon-sounding language to you.

A variable is the value a contact has for a certain property. For example if the property is “firstname” and your name is Jake, then in this case Jake will be the variable for the property “firstname”.

This is why we made it really easy for you to add a variable to the subject line or body of the email by just clicking two buttons. We’ll show you how easy it is to do this in the examples below.

In the subject line

When you’re creating a campaign, the second step in the process allows you to choose your email’s subject line.

Personalizing the subject line is something you can easily do right away. Just create your subject line and click on the “Insert variable” button wherever you want to add the variable.

variable-in-the-subject

A new window will pop up and you can choose the variable you want to use and set up a default value to show if the property’s not available for a particular contact.

values-for-variable

Here’s how the subject would look like in our editor.

subject-with-variable

If everything is set up correctly, the property will be replaced with the value that is associated with each contact once you send your email. And here’s how it will look in the inbox:

personalized-subject-in-inbox

But what happens if there is no value for some of the recipients?

This is when the default value comes into play, as it will be displayed for those contacts that haven’t provided information for that specific property (for this example, it could result in something like: Hey there, did you know about this?). Of course, if you are using variables, you will always want to have something set up as a default value, as otherwise that variable would be blank and the personalization wouldn’t really work with odd blank spots.

“Hey , did you hear about this?” is just a little too annoying.

In the content

And what can Mailjet do to help personalization the email’s content? Well… anything you want!

You can use personalization to add the name of the recipient once again, or anything else that is going to help you address your customers better, and send them the content they would like to receive.

This type of personalization can be used on both marketing and transactional emails. Although there is a slight difference when adding variables in marketing and transactional emails. The first step is either case is the same though: you’ll have to choose the tab ‘Variables’ from the option menu in the content block that you want to add your personalized content.

passport-toolbar-variable

Next, a window will pop up, which will be a bit different depending on whether you’re working on transactional or marketing templates.

Let’s have a look at what that pop up will look like when you’re creating your transactional templates:

adding-variable-passport

On your transactional templates the pop-up window will include the following types of variables:

  • Custom transactional variable: to be used when adding advanced personalization.
  • Contact property inked to the properties in your Mailjet contact list. The Contact property is the one we’ll be using to add standard personalization to your emails.

 

Just like we did before, all you need to do is choose the correct contact property and set your default value. Then, our system will compile the syntax and add it in the template. Easy, right?

And what about your marketing templates? Well, in that case, the pop up window that comes up will look something like this:

adding-marketing-variable-passport

You’ll be able to choose between two types of variables:

  • Contact property: which we’ll be using (as we’ve done before) to add that standard personalization.
  • Predefined tags: which can be used to add things like unsubscribe links, social sharing links, and more.

 

We won’t be looking into predefined tags today, but you can learn more about how we use them for things like unsubscribe links here.

Once you’ve defined the contact property and default value, your content will look like this:

variable-in-the-content

But in the recipient’s mailbox it will look just like this:

personalization-in-the-inbox

How to personalize your emails using MJML or HTML

Of course, if you are creating your emails using MJML or HTML, standard personalization is still an option for you. All you need to do is add this small piece of code into your email and our system will do the rest.

[[data:nameoftheproperty:”defaultvalue”]]

For example: [[data:firstname:”Everyone”]]

That’s all that’s needed on your side. Mailjet’s system will find the value associated with this property and replace it. This syntax can also be used in Passport, if you prefer to do everything manually.

Here’s how the same personalization we did above will look if it is done with MJML:

personalization-with-MJML

Once the email is sent, it will look the exact same way as the one created with Passport.

Summing Up

You can easily create a personalized email that will make everyone want to open and check your email (well maybe not everyone, but definitely a lot more people).

We’ve showed you how easily it is to personalize your email subject lines and content using our email builder, Passport, just by following these simple steps.

And if you think this is getting too easy and want to step up your personalization game, stay tuned to learn how to use advanced personalization and dynamic content!

Want to be the first to know about our new tutorials and useful guides? Don’t forget to follow us on Facebook, Linkedin, and Twitter!

Which SMTP Port Should I Use with Mailjet?

Choosing an SMTP port can be tricky. If you’re configuring your email system to send or relay email, you’re probably wondering: “Which SMTP port should I use?”. Sounds tough…

To be honest, there are a few things to take into consideration. Do you need some kind of encryption? Or would this port be open at the recipient’s end for receiving emails? Does the email service provider you use support this port?

Yes, we know. There are so many things to think about, it’s easy to get lost… Which is why, in this article, we will help you find the answers you need to find the right configuration for you.

What is SMTP?

Simple Mail Transfer Protocol or (simply SMTP) is the basic standard that email servers use to send email to one another across the internet. SMTP is also used by some applications and services to relay their users to other email servers. Using a process called “store and forward,” SMTP moves your email across networks. It works closely with something called the Mail Transfer Agent (MTA) to send your communication to the right computer and email inbox. MTA is each software app used by email clients (e.g. Gmail, Outlook, Apple Mail, etc.)

SMTP could also be used as a TCP/IP protocol to receive emails, however, since it is limited in its possibility to queue messages at the receiving end, it is usually used only for sending. POP3 or IMAP protocols are used alongside SMTP for receiving emails that let the user save messages in a server mailbox and download them periodically from the server. Not so complicated now, right?

What is an SMTP port?

Let’s start with what is a port.

If we are talking about a networking port, it’s not like the ports that let you charge your computer or plug in your mouse to your computer. Ports actually have a very specific and very well defined meaning when it comes to digital communications

To understand how ports work, we need to take a step back and see what happens when computers communicate with each other on the internet.

Let’s say you are trying to reach mailjet.com. In this case, the Domain Name System (DNS) is converting this to the actual IP that is hidden behind the name of the site. In Mailjet’s case, this is 104.199.110.216. You probably could remember 4-5 IPs like ours, but who can actually remember more, or really… who would want to?

smtp-port-mailjet

So, now your server is requesting to connect you with this site from your ISP.

What’s next? Here’s where the port comes in handy.

We know that the address we want to reach and the port number (80 in this case) tells the server what it is you want it to do. You can think of the ports as the number of addresses you would like to reach. The IP address would be equivalent to the physical address of the recipient, and the port number might be the individual within the street that’s supposed to receive your letter.

In other words, a port is an endpoint to a logical connection. At the software level, within an operating system, a port is a logical construct that identifies a specific process or a type of network service.

The port number identifies what type of port it is. Some ports have numbers that are assigned to them by the IANA, and these are called the “well-known ports”, which are specified in RFC 1700.

Each port has two stats – open and closed. If the port is open, it means that you can establish a connection and transfer the information. If the port is closed, you won’t be able to reach it and the connection will fail.

You can actually check if a port is open or not by telnetting it. How to do this? That’s too much for this post, but you can learn more about it in this detailed article.

An SMTP port is one that is meant to be used for SMTP connections. Today, the most common SMTP ports are 25, 465, 587, or 2525. This doesn’t mean that they are the only ones, though. These few ports are the most used ones for these types of connection, and because of that they are almost always opened, which means you should be able to reach your destination. OK, we know that you are excited to learn more 😉

Mailjet’s SMTP relay

Mailjet’s robust delivery infrastructure routes billions of emails to the inbox every month. Our free SMTP relay could be set up in minutes and you will discover just how our powerful features can help you do more with less.

If you’re using Mailjet for sending your transactional emails through SMTP, it is pretty easy to set this up! Once you have created your amazing templates, you can follow this article to configure your SMTP connection. You can do this with any desktop client, such as Outlook or Thunderbird. But even better than that, you can use MTA and MDA, such as Postfix, exim and Exchange.

Of course, you can set up the SMTP relay with any technology that supports SMTP, so you can choose the perfect framework or language for you. What could be easier, right? 😎

Just add your API key as the username and secret key as the password and set up the host/smtp server in-v3.mailjet.com. And now, let’s see what ports we offer for you to use.

Port Purpose TLS SSL
25 Simple Mail Transfer Protocol Port Optional No
80 Hypertext Transfer Protocol Port Optional No
465 Authenticated SMTP over SSL Port No Yes
587/588 Email Message Submission Port Optional No
2525 The Alternative Port Optional No

You can see all the details for these ports below:

Port 25 – Simple Mail Transfer Protocol Port

Every systems administrator (at least of a certain age), knows that SMTP was designated to use port 25 in IETF Request For Comments (RFC) 821. Today, IANA, still recognizes Port 25 as the standard, default SMTP port.
Although port 25 continues to be the most common port for SMTP relaying, most modern SMTP clients could be blocking this port.
Why, you ask?
Port 25 is blocked on many networks because of the spam that has historically been relayed from compromised computers and servers. So, it is true that many ISPs and hosting providers block or restrict SMTP connections on port 25. This helps to cut down a number of unsolicited emails that are sent from their networks.
However, if you are managing an email server you can always decide to leave port 25 open and allow SMTP connection through it. You can implement other securitization on your server, such as frameworks and additional email verification to prevent the sending of spam.

You can use TLS encryption with port 25 with Mailjet.

Port 80 – Hypertext Transfer Protocol Port

Port 80 is the port number assigned to the commonly used internet communication protocol Hypertext Transfer Protocol (HTTP). It is the port from which a computer sends and receives web client-based communication and messages from a web server, and is used to send and receive HTML pages or data. This is the port that the server “listens to” or expects to receive from a web client, assuming that the default was taken when the server was configured or set up.

And you know what the best thing is about using this port? It is open 99.9% of the time! So the chances of your email not getting through are pretty slim. Everybody needs access to the internet and they need this port open.

You can use TLS encryption with port 80 as well.

Port 465 – Authenticated SMTP over SSL Port

IANA initially assigned port 465 for an encrypted version of SMTP, called SMTPS. By the end of 1998, IANA had reassigned this port number to a new service. But still many services continue to offer the deprecated SMTPS interface on port 465. We are one of these services. 😉

The purpose of port 465 is to establish a port for SMTP to operate using Secure Sockets Layer (SSL). SSL is commonly used for encrypting communications over the internet. Typically, you will use this port only if your application demands it.

This is the best way to use a more secure SMTP connection. Port 465 is the only one with which we are accepting SSL encryption.

Port 587 and Port 588 – Email Message Submission Port

Nowadays, port 587 is used for secure submission of email for delivery. Most of the client software are configured to use this port to send your messages. Almost all mail servers support this port. But even if the mail server supports it, it may or may not be open for mail submissions.

With Mailjet, this port is open. To see if it is the same for your destination, you can use the telnet technic.

Using port 587, you can couple it with TLS encryption while using Mailjet. The same applies for port 588.

Port 2525 – The Alternative Port

Port 2525 is not an official SMTP port, and it is not sanctioned by the IETF nor IANA. Almost every ESP supports the use of Port 2525, even though this is not an official SMTP port. It could be used as an alternative to port 587 for SMTP, in case all of the other pots are being blocked.

Port 2525 is probably the most used by users that are hosted on Google Compute Engine and experiencing connectivity issues with port 587.

This port also supports TLS encryption.

What we learned together

Now you can say that you know what an SMTP and network port is- well done, you! Even better, you now know the purpose of some ports and that you can use them for SMTP connections and relays. You can also check if a port is opened in your configuration or the recipient’s one using telnet. 😉

We are sure that, now, if you have any issue with the SMTP relay between Mailjet and your own server, you will know what to test and see if there is an issue with the port connection.

Want to know more about SMTP and Mailjet? Follow us on Facebook and Twitter to be the first to know about our new articles!

How to Set up Template Error Management and Why We Need It

Testing your email templates is tough. Who wants to be checking thousands of code lines for 50 different templates?

That’s why choosing a bug reporting process is necessary. At Mailjet, we are trying to make it as easy as possible for you to do this with our Template Error Management options. Read on and we’ll tell you what Error Reporting is and why you’ll love it. 😉

What is Error Reporting

Good error reporting is essential when building and debugging email templates. No one wants to look at a template for hours, just to see that one small comma is missing…😒 You know the feeling when you want to break your screen with your keyboard? We do and we know how unpleasant it is.

Collaboration Toolkit

As you can imagine, filling out manually a big bug report can take a while. If you need to report dozens of bugs during a testing session, it could take you several hours for one template… This would be painful.

There are many different elements you can include in your bug report. However, using a bug tracker is probably the best way for your organization to move bugs from reported to fixed and help you stay focused. As powerful as bug tracking tools are, the big problem is that you need every person working on the templates to use them and to know how to manage them. But how do you explain to a marketer what “node” means? 🤷

Mailjet’s error reporting is super easy to use for developers, because it gives you a headstart and shows you what to fix and where. For non-developers, it helps to provide more details to you instead of having to rely on insufficient information like say “I got blank / white page”. We all know how no one touched anything, but still something is not working…

template-error-management-fun

Template Error Management at Mailjet

Our goal at Mailjet is to make our products as easy to use as possible. You already know that using our template language is a piece of cake, but it is possible that you missed one curly bracket or a variable was not written correctly and this is breaking everything.

Or you sent the template to the design team to put all the appropriate colors for your brand and someone removed something that seemed strange to them. In fact, it was the most important part of the amazing loop you created.

We don’t want you to waste your time digging into what went wrong, and so we built a solution for you – Template Error Management! We are offering two options:

  • Template Error Reporting
  • Template Error Deliver

Template Error Reporting

Have you ever sent an email but it was not delivered? This could be because our system detected an error with your template and aborted the sending. The main purpose of our template error reporting option is to send you an email to let you know that there is something wrong and provide a detailed explanation of the issue. Here is how it works:

  1. You create a beautiful email template
  2. You compose your API call and declare all of your variables in it
  3. The email is sent by you to our system
  4. Our system checks the template and replaces all the variables with their corresponding values
  5. Our system finds an error
  6. The sending is stopped unless you chose otherwise
  7. Mailjet sends you an email with the error details

So, the first two steps are something that you usually do just perfectly, but this time there was one small mistake in your template. If you have one big template full with loops and conditions, checking everything manually could take forever. This is why we are offering our template error reporting.

To activate it you only need to add this piece of code in your API call:

"TemplateErrorReporting": {
"Email": "youremail@yourdomain.com",
"Name": "Your name"
}

It is important to write the correct email address, because our system will send the report to this address.

These reports should not be an issue for you because the errors are pretty self-explanatory, but we’ve provided some examples of the most common errors below:

unexpected end of template:unfinished end of node ## near ## {{var:url – One of the variables are not closed correctly. In our example above, the variable is missing two closed brackets (i.e. }}) at the end and because of this our template language engine is not recognizing it and cannot compile the template correctly.

not valid template – the template you chose is not the correct one. Most likely the ID does not correspond to the right one. Our system is not detecting the variables you declared in our API call in the template, so you should first check if the template’s ID is correct.

unknown node ## near ## – There is a syntax error in the template. You should check if you have declared all the loops in template language sections.

“var:firstname” is not an array value – This error is generally returned when you try to loop on a non-array value. If you set up a loop as this {% for fn in var:firstname %}, you should declare something like this in your API call: {“firstname”:[“Jane”,”Joe”]}. If this is not declared, our system cannot compile the variables.

No value for “var:items” – you haven’t set up the variable in your API call. If a variable is not declared, our system is not able to replace it in the template with the corresponding value. We don’t want to send a template with {{var:items}} in it, because the recipient wouldn’t know what this should be.

expression parsing error ## Unknown identifier: var:day ## near ## {{var:day ## – This error indicates that the “day” variable is not defined in your Vars. It can be fixed by adding the default value for the variable or making sure that you pass all the variables required by the template.

expression parsing error ## Unknown identifier: day ## near ## {{day ## – This error is similar to the previous one, except for the absence of namespace (var or data). It can indicate that you forgot to specify whether you want to use a Send API variable var:day or a contact property data:day. It can also indicate that you are trying to use a template variable that is not defined in a set function nor a loop statement.

not valid template ## near ## y}} ## – This error occurs when the statement is not finished – missing {% endif %}

What should you do when you receive ## Unknown identifier: var:day ## near ## {{var:day ##, but you don’t see such variable in your template?Well… did you update the plain text version of the template? If the plain text version of the template is not updated, it still contains all the old variables and our system is still trying to compile them. This is why it is better to use our template error reporting. It is much easier for you to manage your templates and to fix some small errors that happened for any given reason.

Template Error Deliver

This second option determines if the message should – or should not – be delivered to the recipient in case of an error while processing the message’s template language. If the below line is not added in your API call, our system will assume this option is not enabled by default:

"TemplateErrorDeliver": true

What does it mean? If you don’t have this small code in your API call, in case there is any error in your template, the email won’t send. Our system will detect the error, it will send you an email with the error report (if you have switched on the Template Error Reporting option of course), and it will not proceed with the sending of the template to your recipients.

However, if you are still in the testing phase, it might be helpful to have this activated. If there is an error in your template, you will receive the error reporting, but you will also receive the uncompiled template itself. Our system will detect the error and will send you the error report email. However, our system will also see that the Template Error Deliver is active and it will send the emails anyways, just as they are.

So the recipient will see all the loops and variables without them being replaced with the data you set up in your API call. Yes, the template won’t look as pretty as it should (and as you and your great design team created it), but it will give you some general idea on how the template will look.

If you want to avoid any errors once your templates are in production, it would be better to remove “TemplateErrorDeliver”: true from your API call. You won’t risk having your template delivered, which will avoid any confusion from your contacts.

template-error-deliver

It is still helpful, though, to keep the Template Error Reporting element active so you can receive an email if there is something wrong with your template.

Template Error Management helps you resolve all issues with the template language in your email templates without losing a lot of time and nerves. Our dedicated API support is always here to help you resolve your issues, if you need any additional help identifying the problem or understanding the error you received via email.

If you want to be the first to get the next useful tips we are going to publish, follow us on Twitter and Facebook. Make sure not to miss a thing!

How To Code An Abandoned Cart Email With MJML

You know how many customers are leaving some items in their carts without processing to the actual purchase? We’re here to make sure you’re ready to give your customers that extra nudge and remind them about those items they once left behind in their carts. Even better you are going to make them even happier, by telling them that those items are on sale. 😏

If you’re a thorough follower of our tutorials, you may already know that, we’re showing you how to create and send awesome transactional emails step by step. We’ve already showed you how to create welcome email and email receipt using template language and MJML. Now, you’ll learn how to create abandoned cart emails.

A templating language for your transactional emails

Are you tired of creating a separate template for all your needs? Template language is here to offer you the best solution! You’ll be able to create one template for all your purposes using our template language.

Template language is available in different languages and using multiple libraries, so you are probably familiar with at least one of them. It’ll be a piece of cake! 😉

Mailjet’s Templating Language

At Mailjet, we know the value of a fully integrated templating language, which is why we created our own templating language with our Transactional Send API in mind. We’re here to help you manage everything in one template, to save you time and effort.

So, let’s recap: MJML for producing responsive HTML emails without effort, plus a templating language to bring them to life with conditional blocks and variables.
This combo can change your life as a developer. But, enough words, you’ll definitely want some action. That’s why we’ve decided to show you how to create and send awesome transactional emails, step by step.

The “How to code” tutorial: what you need to know

We’re rolling out a series of tutorials, all of which will explore a very common use-case, providing numerous examples, code snippets and nice visuals. We’ve even created an easy-to-execute tool, written with NodeJS, to test emails under actual conditions. To use it, you’ll just need valid credentials for both MJML API and Mailjet Transactional Send API, but don’t worry if you’re a newcomer: applying for the MJML API beta and creating a Mailjet account are totally free.

Our “How To Code” series has four parts. Check them out now:

How to code an abandoned cart: Quick Introduction

Today, we’re going to see how to implement an efficient abandoned cart email using MJML, the open-source email framework with 7600+ stars on Github open-source email framework, and our templatе language. Here’s a quick preview:

abandoned-cart-preview

When a customer adds products to their cart but doesn’t check out, it doesn’t mean the sale is definitively over. Here are some numbers for you: 50% of abandoned cart emails are opened, and more than a third of them trigger clicks to redirect customers to the website. And these figures could be even higher during a sale, when you’ll have the chance to offer your customers that additional tempting discount.

This high rate can be easily explained: customers often abandon their carts without meaning to do so, be it because of website crashes or times out (sure, that never happens to yours), or simply because they needed some time to think. This is why an abandoned cart email can be a successful way to re-engage customers, guide them through to the last step in your buying process or allow them to recover lost purchases.

A proper abandoned cart email should include the following:

  1. The items left in the cart.
  2. An incentive, such as a discount or a special deal, personalized for your user.
  3. Some new articles your user may prefer.

Let’s focus on these points.

How to create an abandoned cart email

You should encourage your clients to resume their shopping experience, just where they left it. This implies that your email template should display the abandoned cart, just as it looks on your website, both in terms of design and in terms of the items left behind. Easy to say when you’re using the [name here any trendy JS framework], but how do you do this in an email? The solution: use our templating language loops and variables directly into your email to display a cart based on raw JSON data.

Coding the abandoned cart section

Let’s start from the top of the template. We are going to use mj-navbar as container. We’ll choose this container as it is better suited for our needs and it’s already formed by two mj-column. The first one will contain mj-image and the other one the mj-inline-links component, which will create your links based on a list of mj-link children.

Of course we are going to add some CSS code to make our template prettier and here’s what we have:

Coding the body of the template

Now, let’s see how to code the main body of the template. As a general rule, it is recommended to keep it as close as possible to your cart’s main design on the website. Here’s our code:

As you can see, we’re using two nested mj-section. We’ll do this because the MJML API we’re using for this tutorial does not support the component yet.

Defining the items in the cart

Next, we’re going to configure everything related to the items in the cart. To do so, we are going to set up this loop {% for single_element in array_variable %}, using the following pattern: {{ var:property_key:default_value }}. Within the loop, a new variable single_element is created and updated for each iteration, ready to be used.
Here’s the MJML code for the display:

If you want to know how to set up your API call, visit our documentation here.

Coding the section with the additional discount

We are almost done! Now we need to let our customers know the good news! There are sales, oh surprise, the items that they left behind are now with discount! Who doesn’t love discounts? Probably some customers abandon their carts because they initially thought your products were cheaper. Hold on… Where did all these taxes and shipping fees come from? Well now, with the discount on the items, the customers won’t even notice those additional costs.
Here again, we’ll use a mj-table to display two sub-columns:

To win these customers back, the best way is to issue a discount or offer them free shipping, in the form of a deal that looks as if it was directly branded for them. To do this, add blocks to your template that only show up under specific conditions. In this tutorial, conditional blocks come to the rescue.

How to code section with other suggestion

Abandoned cart emails can provide a nice opportunity to present other products. You surely have a nice algorithm for recommendations – use it to generate some JSON data and, with our templating language, display nice personalized blocks directly in your email.

How to code CTA button

This is the easiest part. 😉 To add the CTA button, just use the code below for the mj-button:

Time to jump on Github

OK, we’ve given you an overview and some code examples to create an amazing abandoned cart email. Now it’s time to create your own with your own design.
You’ll find everything you need on our detailed tutorial on Github, complete with examples and code samples.

Github-tutorial-blogpost-banner 4

Have you missed the previous tutorials? Check them out here:

How to create an e-commerce receipt email

How to send a welcome series email

We’ve also created an easy-to-execute tool, written with NodeJS, to test emails under actual conditions. To use it, you’ll just need valid credentials for both the MJML API and Mailjet’s Transactional Send API. Don’t worry if you’re a newcomer: applying to the MJML API beta and creating a Mailjet account are totally free.

Do you want to be informed about the next tutorials? Come and say “hi” on Twitter or join us for a chat on Facebook

How to Use Templating Language to Send Truly Personalized Emails

Dear {{var:name}},

Wouldn’t it be cool to read an article that actually starts with your name? It would certainly grab your attention.

Well, what still sounds like a distant fantasy for the Mailjet blog is definitely a possibility for your emails using a template language.

If you’re not familiar with it yet, this post will tell you all you need to know to turn the template language function into your new email best friend.

What is template language?

A template language is a language that allows you to define placeholders within your templates that will be personalized depending on a set of variables or property details. Modern template languages don’t only support placeholders, but also loops and conditions that are often necessary to design a web page or an email.

Everyone likes to feel a personal touch in the emails they receive. It’s like if someone had thought about what you’d like to see, and had handpicked the perfect items or information just for you. We are not only talking about including a client’s first name, but using all kind of conditions, loops and functions to display content based on the recipient’s interests.

You’re probably already receiving these personalized emails while playing World of Warcraft, probably from Blizzard alerting you about the new great promotion on ingame items. So why not doing for your business too? It’s actually pretty easy to do, and email personalization usually increases the open rate by over 30%.

For example, say you have a sport e-store. You could send golfer Frank an email with all your new golf sticks, while tennis-player Diane would receive a message featuring the best tennis rackets.

If you are wondering how much is too much personalization, worry not – there is no such thing! Anything that’s personalized in the email will draw the recipient’s attention. And if you are showing them the perfect items, this will for sure generate more visits and purchases on your site. Think about your email as an invitation to check out what you found for them.

Why should you use Template language?

By using a template language for your transactional emails, you’ll be able to work with fewer templates, which will include different sections that will be displayed depending on the situation. Yes, you’ll still need a different template for account creation and for password reset, but there is no need to have five separate ones for each language you work with, for example.

Using Template language, you can add different sections for each language you need in one same template or propose a range of products for men and women in your order confirmation emails, using sections that display based on the client’s language or gender. Our system will collaborate with yours and show the appropriate option, depending on the customer’s properties defined as a variables in the API call.

Give it a try and see the magic behind the template language – you’ll never want to go back to working on 100 different emails for hours (or days…)!

How to use Mailjet’s template language?

Template languages and libraries are available for many programming languages, and choosing a language for your current needs is not difficult.

Mailjet’s Template Language follows a syntax close to the one used by the most popular template languages, such as Jinja2 or Twig, which means you’ll already be familiar with it. We made is easy and logical so even non-programmers can use it. 😉

Mailjet’s Template Language offers the perfect balance between power and ease.

You can apply it to your transactional emails using our awesome API, our collaborative editor Passport, MJML or HTML.

Mailjet’s template language can be used with IF conditions and FOR loops (wrapped between {% … %} delimitators) and supports the following operators:

  • Arithmetic operators,
  • Comparison operators,
  • Logical operators.

To learn more about which ones you can use and how to add them, check out our documentation here.

Let’s get practical: Applying high personalization with templating language in Mailjet’s builder

We know you’re probably keen to learn how it works, so let’s see how you could use some basic template language functions in Passport, Mailjet’s intuitive email builder, and then declare the variables in your API call.

Step 1: Creating the template

To get started, first create the template you need. In our example, we’ll work with an order confirmation.

Let’s say that Diane bought one of the tennis rackets you sent her (hooray!) and now you want to:

  1. Confirm her order.
  2. Show her items that she could also like.
  3. Give her an additional discount for her next purchase, which you normally do after a client’s third purchase.

This is the information we already have about Diane in our database:

First Name: Diane
Age: 28
Sports: Tennis
Number of purchases: 3

So, to get started, we’ll choose a template from Mailjet’s template gallery, add our logo and create our copy, with variables that we can set up, even without the template language.

This is what the template would look like:

order confirmation - first part

As you can see above, we’ve used these variables: {{var:ordernumber}}, {{var:firstname}}, {{var:product}} and {{var:companyname}}.

Step 2: Adding order details with Mailjet’s Template Language

So now for the fun part – using Mailjet’s Template Language. Just drag and drop the template language section wherever you want within the template, like this:

how-to-use-template-language-section

It might look like a boring section now, but not for long.

To display all the details of the purchased item and add new product proposals for Diane, you just need to click on the < > brackets that will show up when you select the section. A new window will open so you can add the code.

In the first section we are going to add {% for %} statement that will include an array of variables with all the details about the purchase. In our case it will look like this:

{% for article in var:products %}
{{ article.name }}
{{article.number}}
{{article.price}}
{{article.totalprice}}
{% endfor%}

You can choose the style and declare it as you wish in the same window in which you set up the loop.

Step 3: Displaying product recommendations

We are going to add a second template language section now. Let’s use one of our editor’s cool features and choose a section that should only be displayed to customers with that have added tennis as their favorite sport.

It’s actually pretty easy to do this. You just need to click on the section you want to apply the personalization to, and the option will appear in the upper left corner. This is an easy way to use an IF conditions for whole section.

template-language-section-condition

Now, click on “Add condition” and configure the right option for your specific use case. Here’s ours:

condition-section-template-language

Here, we’ll add the array of variables to be shown to customers that have marked tennis as their favorite sport:

{% for line in var:suggestions %}
{% for product in line %}
{{product.name}}
{{product.price}}
{% endfor %}
{% endfor %}

You can add as many of these sections as you want, based on everyone’s favorite sport, but you should also set a section without any conditions in which you include some basic suggestions for those that haven’t specified a favorite sport.

Step 4 – Adding shipping and billing information

Next, you want to add a new section with the billing information and shipping details, in two columns. This is what the section will look like:

template-language-billing-section

Step 5 – Including a discount

Finally, we’ll add a section offering Diane her and we are going to thank her:

template-language-thank-you-section

And here is the whole template we created together:

template-languae-order-confirmation-code

Step 6 – Syncing Mailjet’s Template Language with your system

We’re nearly there.
Below you can see the API call we’ll use to turn this rather plain template into a really cool confirmation email.
Here’s where we need your system to be involved. You’ll have to create a script on your end that will fill out all the variables with the all information you have about Diane and about your products.

curl -s \
    -X POST \
    --user "$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE" \
    https://api.mailjet.com/v3.1/send \
    -H 'Content-Type: application/json' \
    -d {
        "Messages":[
                {
                        "From": {
                                "Email": "youremail@yourdmaint.com",
                                "Name": "Your Name"
                        },
                        "To": [
                                {
                                        "Email": "recipeintemail@domain.com",
                                        "Name": "Recipient Name"
                                }
                        ],
                        "Variables": {
                        "ordernumber": "#12345",
                        "firstname": "Diane",
                        "product": "Tennis Racket",
                        "companyname": "Sport",
                        "products":[
			{
			"name": "Product: Tennis Racket",
			"number":  "Quantity: 1",
			"price": "Price : $30.00",
			"totalprice":"Total Price: $30.00"
			}
			],
	"suggestions": [
		[
			{
			"img": "",
			"name":  "Product: Tennis skirt",
			"price": "Price: 23€"		
			},
			{
			"img": "",
			"name": "Product:  Tennis bag",
			"price":  "Price: 45€"
			},
			{
			"img": "",
			"name": "Product: Tennis balls",
			"price": "Price: 8€"
			}
		]
		],
		"billingfull_name": "Adress: Your address",
		"billing_city": "City: Paris",
		"billing_addresspostal_code": "Postal code: 75008",
		"shippingfull_name": "Adress: Your address",
		"shipping_city": "City: Paris",
		"shipping_addresspostal_code": "Postal code: 75008",
		"discount": "10%",
		"Sport": "tennis"
                        },
                        "TemplateID": 123,
                        "TemplateLanguage": true,
                        "TemplateErrorReporting": {
					"Email": "youremail@yourdmaint.com",
                              			 "Name": "Your Name"
				},
                        "Subject": "Order confirmation"
                }
        ]
    }

Once that’s done, you can add some finishing touches to the template and voilà, all is done and the email is ready to be sent. Here’s what Diane will receive:

template-language-final-email

Looks great right? Now you know how to create amazing templates like this one with Mailjet. 😏 And soon, we’ll show you how to do this with HTML and more advanced functionalities of our template language, so you can take this to the next level.

Wrapping up:

We’ve explained the wonders of using a template language and shown you how to create an order confirmation email with Mailjet’s Template Language and our email editor, Passport.

But there’s so much more you can do! This dynamic duo will help you create amazing account confirmation emails, password reset emails, abandoned cart notifications, etc. Keep an eye out for our next posts, in which we’ll show you how to do just that, using the template language in Passport, or applying it on MJML or HTML.

And… don’t forget to follow us on Twitter and join us on Facebook as well! We are always happy to hear your ideas and comments. :)

How to Set Up a Double Opt-In Subscription Form via Mailjet’s API

Deliverability is a pain. We know it.

That’s why, here at Mailjet, we are doing our best to get your emails straight into the inbox, but we need your help as well. We know that you want this too, in order to consistently generate more visits to your site.

While Mailjet can provide a solid infrastructure, industry leading deliverability tools, and a team devoted to you deliverability, your role in this partnership is to ensure 100% of your list has opted-in to receive communications. Because they have, haven’t they? 😉

Opt in for best deliverability

Opt-in subscription forms can be used to capture contact information from customers and visitors in a variety of ways: pop-up forms on the homepage or product pages, dedicated landing pages, and embedded widgets across your website.

A customer subscribing on your platform is like a verbal confirmation of interest in receiving your communications, however a double opt-in subscriber is like getting their signature. Not only does it really prove their consent, but it also is indicative that they really want to engage with your content, products, or services. These are the most valuable contacts.

single opt-in vs double opt-in

Single opt-in vs Double opt-in

There are two types of opt-ins – single and double. While the single opt-in only requires users to provide their email address in one step, the double opt-in widget includes two steps to confirm the subscription. Single opt-in subscriptions skips a crucial second step – confirmation. Side note: Stay tuned for our next article where will explain more about the differences between single and double opt-in.

Why is double opt-in better?

This validation process consists of receiving an email with a custom confirmation link.This will guarantee that the address is in fact valid and it’s owner agrees to receive your marketing campaigns. It eliminates the chance of abuse where somebody submits somebody else’s email address without their knowledge and against their will. At the same time, typos in email addresses are also caught, as are the risk of bots mass subscribing to your content.

By using double opt-in you can reduce spam complaints down to well within acceptable levels (e.g. at Mailjet we make sure our users do not get more thank 0.08% spam complaints).. While double opt-in is not obligatory by law yet, the GDPR is still requesting valid and unambiguous consent for subscription.

GDPR double opt-in

Often quality is better than quantity, and this is certainly the case in emailing. You will have very strong deliverability rates and you will know your audience will be anticipating and willing to read your newsletters. This sure beats sending emails to addresses with typos, bots, or fake accounts.

How to set up a double opt-in through Mailjet’s API

By now hopefully we have convinced you that it is far better for you to use a double opt-in subscription widget, so now we are going to explain how to create one through our API. This is a good solution if you already have an existing opt-in and you just want to connect it to Mailjet, or if you think using our subscription widget is just… too easy for you. 😏

In the diagram below you can see a schema of the process and the steps to follow to make the connection between your system and ours through our API:

Now, let’s have a look at the different steps.

Blog-Double-Opt-In-Schema

Step 1 – Contact’s subscription

Lucky you! Your visitor has decided to subscribe to one or more newsletters via an opt-in on your site.

This form can also contain additional contact properties (like first name, last name, city, gender, etc.). Basically, anything you find useful later to segment your list or personalize your newsletter.

Step 2 – Creation of the customized confirmation link

When the user completes the subscription form, the email address and contact properties will be saved on your system. Then you will have to generate the custom confirmation link that should be send to the client by email. This custom URL should guarantee that the subscription cannot be faked and only the person you are addressing can click on it.

For example you can use MD5 hash algorithm to convert the name of the recipient to 128-bit hash value. Then you could insert it as a variable at the end of the confirmation link. Your system will perform a MD5​ of the email address concatenated to a specific SecretKey​ which will be corresponding to the custom URL.

 http://mysystem.com?{{var:Email​OfTheUser}}&{{var:MD5hash}}

 

Step 3 – Sending of the confirmation email

After your system creates the customized confirmation link, it is time to leverage our Send API through a POST request. You should create a template for the confirmation email that will contain the custom URL. You can design the template with our intuitive email builder, Passport, or via our API using Mailjet’s templating language. You can insert the confirmation link behind a button or just as it is. Below you can see an example of an API call that you can use:

# This call sends a message to one recipient.
curl -s \
-X POST \
--user "$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE" \
https://api.mailjet.com/v3.1/send \
-H 'Content-Type: application/json’ \
-d ‘{
    "Messages":[
            {
                        "From": {
                                 "Email": "sender@email.com",
                                 "Name": "Sender Name"
                        },
                        "To": [
                                {
                                     "Email": "recipient@email.com, 
                                     "Name": "Recipient Name"
                                }
                        ],
                        "Variables": {
                                "MD5hash": "MD5hash",
                                 "EmailOfTheUser": "EmailOfTheUser"
                        },
                        "TemplateLanguage": true,
                        "Subject": "The subject you want", 
                        "TextPart": "Welcome to our mailing list! Please activate your subscription by clicking in this link: 
http://mysystem.com?{{var:EmailOfTheUser}}&{{var:MD5hash}}", 
                        "HTMLPart": "Welcome to our mailing list! Please activate your subscription by clicking in this link: 
http://mysystem.com?{{var:EmailOfTheUser}}&{{var:MD5hash}}" 
                       } 
           ]
   }’

 

Step 4 – Creation of template

If you want to use an awesome template you created with our email editor, Passport, or with MJML / HTML code, you can send it easily with the API, by following the steps here or using the example below:

curl -s \
    -X POST \
    --user "$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE" \
    https://api.mailjet.com/v3.1/send \
    -H 'Content-Type: application/json' \
    -d '{
        "Messages":[
                {
                        "From": {
                                "Email": "sender@email.com",
                                "Name": "Sender Name"
                        },
                        "To": [
                                {
                                        "Email": "recipient@email.com",
                                        "Name": "Recipient Name"
                                }
                        ],
                                "Variables": {
                                "MD5hash":“MD5hash",
                                       "EmailOfTheUser": "EmailOfTheUser"
},
                         "TemplateLanguage": true,
                         "TemplateID": 123,
                         "Subject": "The subject you want to use"
                          }
                 ]         
             }'

 

Step 5 – Customer’s confirmation

At this step, the action should be completed by your customer. They are going to receive your email and they will have to click on the confirmation link in it.

Step 6 – Adding and sync of the contact

The user has done their part and that means that they are ready to be added to your contact list. Now a confirmation page should be displayed to them thanking them for their subscription.

The opening of this page should refer back to your system with the appropriate parameters (email and MD5 hash). They will give you the MD5 checksum (Secret Key) corresponding to the confirmation link associated with this user. If the parameters are correct, the contact will be added in your system.

MD5 checksum == EmailOfTheUser + MD5 hash value

Example:
Recipient Name: John Smith and recipient email johnsmith@email.com

Secret key in your system == johnsmith@email.com + 6117323d2cabbc17d44c2b44587f682c

Step 7 – Adding customer’s properties

Only one thing left to do – add the client to the list and attribute the properties they provided. This can be done by your system which should call Manage Contacts endpoint of our API.

Here’s an example of the request:

 # Add a contact to the list
curl -s \
    -X POST \
    --user "$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE" \
    https://api.mailjet.com/v3/REST/contactslist/$LIST_ID/managecontact \
    -H 'Content-Type: application/json' \
    -d '{
        "Email":"recipeint@email.com",
        "Name":"Recipient Name",
        "Action":"addnoforce",
        "Properties":{
                "property1": "value",
                "propertyN": "valueN"
        }
    }'

 

Important: If your contact specified some properties, you should make sure you have defined those properties in advance in the Mailjet system with the user interface or with the API.

# Create : Definition of available extra data items for contacts.
curl -s \
    -X POST \
    --user "$MJ_APIKEY_PUBLIC:$MJ_APIKEY_PRIVATE" \
    https://api.mailjet.com/v3/REST/contactmetadata \
    -H 'Content-Type: application/json' \
    -d '{
        "Datatype":"str",
        "Name":"Age",
        "NameSpace":"static"
    }'

 

And with that, it is all done!

Collaboration Toolkit

Summing up

We’re sure by now, you’re convinced double opt-in is the way to go to ensure you’re only sending emails to contacts that really want to receive them, and to ensure optimal deliverability.

Once you have created your widget and configured the scripts to sync your contacts with with Mailjet, you’re ready to start sending. From now on, any contact that enters your database and confirms their subscription will become part of your list at Mailjet, with all of the properties they declared.

Now you can continue with the creation of your awesome campaigns to send to all those new subscribers. You can see how to do so here.

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