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Free SMTP server to power your emails

As one of the world's leading email service providers, Mailjet's robust delivery infrastructure routes billions of emails to the inbox every month. Easily set up our free SMTP server in minutes and discover how our platform will help you send your emails faster.

Configure your SMTP relay in minutes

Mailjet's free SMTP server integrates easily with any system. You can update your configuration using our SMTP server, one of the supported ports, and simply authenticate with your credentials (like an API key or secret key).

SMTP configuration.
Inbox being filtered by SPF, DKIM, and DMARC.

Benefit from a variety of ports

Mailjet supports a variety of ports with our SMTP relay, offering you greater flexibility. You can choose the port that is most suitable for you depending on your email client or ISP and have access to either TLS or SSL encryption to ensure your emails are secure.

Improve your inbox placement

With our SMTP relay, you will not only increase your chance of landing in the inbox, but your emails will get there faster. Easily set up SPF, DMARC, and DKIM records to authenticate your domain and start sending. Our deliverability support team will be there every step of the way to help get you set up, monitor, and maintain high deliverability rates.

Where you land in the inbox.

Use the MTA and framework you prefer

Use your preferred Message Deliverability Agent or Message Transfer Agent (MTA) such as Postfix, Exim, or Exchange to send via Mailjet’s SMTP relay. You can also use PHP, Java, or any other frameworks or languages you prefer, making it easier for you to start sending immediately.

Deliverability statistics for a Mailjet email campaign.
Statistics from Mailjet that allow for continuous improvement.

Monitor your email performance

Mailjet’s real-time dashboard makes it easy for you to browse, filter and troubleshoot key performance indicators like opens, clicks, bounces, and unsubscribes, and more. You can also easily integrate in your systems to receive each event notification in real time thanks to webhooks.

Personalize your emails

Our advanced templating language allows you to add more detailed personalization and dynamic content to your emails. Send the right content to each of your recipients to achieve even higher engagement rates.

Dynamic sections create increased personalization.
Parse API code.

Rely on our robust and scalable infrastructure

Mailjet's robust delivery infrastructure routes billions of emails to the inbox every month. Our auto-scaling mechanism adapts to your volume needs to ensure your emails are sent even in high volume moments. We have more than 720 servers worldwide to guarantee you an uptime of 99.9%.

Get the help you need

Our multi-lingual support teams are here to help you 24/7 in English, French, Spanish and German. Get answers to all of your questions to quickly solve any technical issues or improve your deliverability.

Mailjet's support experts help with deliverability.

Mailjet makes landing in the inbox easy.

With billions of emails being sent monthly,
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