Powerful & Reliable Email API Service | Postmark

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Easy integration, reliable delivery, great documentation: integrate with the email API that developers love and start sending in minutes.
Integrating email into your product doesn’t have to be a pain. With our powerful RESTful email APIs and robust libraries in pretty much every programming language, integrating email is fast and easy—whether you’re sending transactional or bulk email.
Simpler applications can also use our reliable SMTP service.
It was incredibly easy to setup Postmark. In under 10 minutes I had the first test working and rolling it out to production was just as easy.
People always say “don’t set it and forget it” but we actually strive to help you do just that. Once you integrate with Postmark, you can count on us to get your emails delivered fast and reliably—so you can go back to building great products.
Been a Postmark customer for a very long time. Stability and deliverability is so good I sometimes go months without thinking about it. It just works.
Ben Webster Cofounder of Insured by Us
We take great care of our API documentation so that you have the information you need to easily integrate with Postmark. Plus, our handy API Explorer lets you test-drive API calls against your account and returns real data.
Our knowledgeable support team is always on hand to help, whether it’s through 1-on-1 calls, webinars, email, live-chat or one of our many help docs and guides.
Customer feedback gathered over the past 60 days.
With our flexible email APIs you can manage domains and templates, retrieve stats, process inbound email, and so much more. For many email providers, APIs are an afterthought. Here at Postmark, we think API-first.
With Sandbox Mode you can test and experiment with our API without the risk of accidentally sending email to real recipients.
We guide you through setting up DMARC and SPF to help protect your domain from spoofing.
Notify your application every time an email is delivered, opened, bounces, or a link is clicked with webhooks.
Our monthly newsletter is packed full of email tips, product announcements, and interviews with industry experts.
Ask us anything! We’re eager to help you with any problem or question you have…