Free SMTP server
Mailjet’s free SMTP server sends both marketing and transactional emails reliably. One powerful platform for developers and marketers with GDPR compliance, 99.9% uptime, unlimited contacts, and setup in minutes.
Trusted by 100K+ companies
48B emails sent annually
GDPR & ISO certified
Manage marketing and transactional messages in one place, giving every team clear visibility and saving hours each week.
Send to unlimited contacts with volume-based pricing, so budgets stay on track even as your list grows from thousands to millions.
Rely on 99.9% uptime and 48B emails sent yearly by 100K+ companies to keep every important message flowing smoothly.
Meet GDPR and ISO requirements automatically with EU-based infrastructure and certified data handling.
Mailjet combines marketing campaigns and transactional emails in one platform, eliminating the need for multiple tools. With a free SMTP server and robust email API, both developers and marketers can send emails confidently with built-in GDPR compliance, 99.9% uptime, and unlimited contacts.
Unified platform for all email needs
Developer-friendly SMTP relay and REST API
Intuitive no-code editor for marketers
Transparent, volume-based pricing
CONSOLIDATE TOOLS
Mailjet unifies marketing and transactional emails with contact lists, templates, analytics, and APIs so developers and marketers collaborate smoothly without costly integrations.
One login for every email need
Unified analytics and contact lists
No more fragile integrations
PREDICTABLE COSTS
Mailjet’s volume-based plans include unlimited contacts, giving finance teams predictable invoices while marketing enjoys the freedom to grow lists without penalty.
Unlimited contacts included
Volume-based plans scale smoothly
Transparent monthly billing
POPULAR USE CASES
Send order confirmations, shipping updates, abandoned cart reminders, and promotions from a single platform that unifies marketing and transactional flows.
Deliver password resets, account alerts, onboarding sequences, and product news with guaranteed reliability and rich analytics.
Automate appointment reminders, service confirmations, customer messaging, and newsletters without juggling multiple tools or vendors.
Scale from first customer to millions of sends with unlimited contacts, predictable costs, and no need to switch providers.
POWERFUL FEATURES
Automatically deliver time-sensitive messages like password resets and receipts with guaranteed speed and reliability.
Design, segment, and send engaging campaigns to large lists using intuitive templates and advanced targeting.
Integrate in minutes using familiar SMTP credentials or powerful REST endpoints. Your choice, same great results.
Track opens, clicks, bounces, and blocks in real time to safeguard sender reputation and improve inbox placement.
Insert dynamic, recipient-specific content that boosts engagement and drives higher conversion rates.
Connect via ports 25, 465, 587, or 2525 with TLS or SSL encryption for secure, reliable delivery in any environment.
Access detailed performance dashboards to make data-driven decisions and continuously improve results.
Meet European data privacy requirements automatically with ISO-certified, EU-based infrastructure.
Switching from our own SMTP was only a matter of changing a few lines of code…The icing on the cake is that some deliverability best practices are built in and others are easy for us to automate on our own, making sender reputation management a breeze for us. For example, if someone marks one of our emails as spam, their address is automatically removed from our mailing lists.
At MileIQ, email is an important part of our engagement strategy. On a monthly basis, we are sending about 10M emails, powered by Mailjet. The majority of emails are transactional and lifecycle as the user engages with the service. We were looking for a partner that could offer really solid customer support and service as we figured out how to design this service, and we needed an ESP that would scale with us over time. For me, the key reason to work with Mailjet is we know we have a partner that wants to scale with us as we grow our business and I think that’s really important.
Ultimately, it matters that our emails get delivered to the recipient quickly and efficiently. We’ve got confidence in the performance, deliverability and reliability of the platform. We have plenty of other things to focus on when growing our business – so it’s nice to be able to rely on a partner like Mailjet for our email delivery.
Mailjet offers volume-based pricing with unlimited contacts, so you never pay more as your list grows. Start with a free SMTP server and upgrade as your needs evolve.
Free tier available
No setup fees
Cancel anytime
Experience reliable email delivery, unlimited contacts, and built-in GDPR compliance all in one platform. Join 100K+ companies who trust Mailjet for their marketing and transactional email needs.
A free SMTP server allows you to send emails from your applications without upfront cost. You receive SMTP credentials to relay messages through secure, professional infrastructure with built-in deliverability features.
Limits depend on the provider. With Mailjet, you can start sending immediately and scale from 6,000 to over 500,000 emails monthly with volume-based pricing.
Yes. Mailjet is GDPR compliant, ISO27001 and ISO27701 certified, SOC 2 compliant, and hosted in EU-based data centers for data protection.
Yes. Mailjet’s SMTP relay supports both marketing and transactional messages. You can send newsletters, promotions, product announcements, and other bulk campaigns through SMTP, and you can also deliver account notifications, password resets, receipts, and other time sensitive messages through the same channel. Most customers segment the two by applying different sending addresses, sub accounts, or custom message headers so engagement data stays separate and deliverability can be monitored accurately.
Integration is fast and simple. Mailjet provides clear documentation, straightforward SMTP setup, and developer-friendly tools so most teams connect in minutes.