Tools/Email/Postmark
Postmark logo

Postmark

Reliable, fast email API for transactional messages

Postmark primary screenshot

What is Postmark?

Try Postmark

Postmark is an email delivery service built for sending time-sensitive transactional messages reliably. You can send via its Email API or SMTP, and use message streams plus templates and webhooks to manage common notification flows. It also includes analytics and deliverability-focused safeguards so you can reduce inbox worries while you build products.

What does Postmark do for reliable transactional email delivery?

Postmark helps you send app and customer transactional emails through an email API and SMTP service designed for fast, reliable delivery. It’s built to help you worry less about whether messages arrived, with tools for deliverability and visibility into message activity and issues.

Is Postmark no-code friendly if I’m not a developer?

Postmark is primarily designed around sending messages through its Email API and SMTP service, with API libraries and quick-start docs to help teams integrate fast. If you want to send emails from your application, it’s built to fit into typical software stacks rather than acting as a standalone drag-and-drop email tool.

How does Postmark separate promotional and transactional emails?

Postmark routes promotional messages (like newsletters) through a separate but parallel sending infrastructure, so they don’t mix with your transactional emails. This is intended to protect the deliverability of time-sensitive messages like notifications and password resets.

What’s the Bulk API in Postmark and when would I use it?

The Bulk API lets you send a single message definition to many recipients with personalization variables. Postmark compiles the individual messages for you in a single request, making it convenient for broadcast-style use cases.

How do I track progress for a Postmark bulk send?

You can check the status using the /email/bulk/{bulk-request-id} endpoint. It provides the total message count, completion percentage, and the current status such as Accepted, Processing, or Completed.

Does Postmark handle rate limiting for bulk sending?

Yes. Postmark automatically throttles sends to an optimal rate to help maintain deliverability, so you don’t have to manage rate limiting yourself.

Last updated
Oct 6, 2026
Date listed
Apr 13, 2026