Postmark
Reliable, fast email API for transactional messages
What is Postmark?
Try PostmarkPostmark is a transactional email delivery platform built to help teams send critical messages reliably and quickly. It offers a REST API and SMTP, includes secure inbound email processing, and supports event webhooks for automation. You also get tools like Message Streams and deliverability features (like DKIM, SPF, and DMARC authentication) to help protect inbox placement.
What does Postmark do for teams sending transactional emails?
Postmark helps you send transactional emails such as welcome messages, password resets, and notifications with industry-leading delivery speeds and detailed delivery analytics. It’s designed for scenarios where reliability and inbox placement matter, including both outbound transactional sending and inbound email processing via webhook-ready JSON payloads.
Is Postmark a good no-code option if I want to automate email workflows?
Yes—Postmark supports event webhooks that you can connect to your own systems, and it’s commonly used alongside automation tools so you can trigger downstream actions based on delivery events. Postmark also provides a Sandbox Mode and dynamic API documentation to help you validate your integration as you build.
How does Postmark separate transactional and marketing/bulk emails?
Postmark uses Transactional Message Streams for transactional traffic and Marketing/Bulk/Broadcast message streams for higher-volume campaigns. Depending on your plan, you can create multiple streams to keep these sending types organized and distinct.
What email analytics and event data can I use with Postmark?
Postmark includes detailed analytics and insights, including granular bounce data and delivery, bounce, spam, and open rates. It also supports event webhooks (with secure webhook endpoints) and link tracking so you can monitor and improve email performance and automate responses to events.
Does Postmark offer a free plan or free trial, and what’s included?
Yes. Everyone starts on a free Developer tier with 100 emails per month, and it never expires or runs out. The free plan is designed for testing your integration and evaluating deliverability, with no overages allowed; paid plans start with Basic at $15/month.
What happens to my sending if I exceed my monthly email limit?
Postmark plans are built around monthly email limits with overages handled by the plan’s extra-email pricing where applicable. If you want unlimited daily sending within your plan, Postmark specifies unlimited emails/day and charges per additional 1,000 emails for each tier beyond the included monthly volume.