
Postmark
Reliable, fast email API for transactional messages

What is Postmark?
Try PostmarkPostmark is an email delivery service built for fast, reliable transactional messaging. It gives you an email API and SMTP options to send critical emails like notifications and password resets while helping protect deliverability. Postmark also separates transactional and promotional traffic so your important messages aren’t competing for inbox placement.
What problem does Postmark solve for teams sending transactional emails?
Postmark helps you deliver essential, user-facing emails with fast, reliable delivery. It’s designed for transactional messages such as password resets, notifications, and order-related updates where inbox placement matters.
How does Postmark support no-code and “automation first” workflows?
Postmark is available through tools like Zapier, and it also connects with products that support automations and workflow triggers. You can use these integrations to route email events, send notifications, and connect Postmark to apps without building everything from scratch.
How do I keep newsletters and transactional messages from affecting each other?
Postmark uses Message Streams to separate promotional and transactional traffic. Promotional campaigns can be routed through separate sending infrastructure, helping protect deliverability for your transactional emails.
Which analytics and event tools can I use with Postmark?
Postmark includes Analytics & Retention so you can measure email performance and recipient engagement. It also supports webhooks, letting you connect email events to your own systems and automate downstream actions.
What integrations are available for popular apps and platforms?
Postmark has integrations for services like Datadog (analytics and webhooks), Craft CMS and Craft (via the Postmark mail adapter), Customer.io and ActiveCampaign (data-driven and automation-based sending), Supabase, Bubble (no-code), Stripe, Slack (bounce and status updates), and many more through Zapier and the broader integration list.
How do I integrate Postmark into WordPress?
You can use Postmark-focused WordPress options like the Postmark Plugin for WordPress or WP Mail SMTP to send and track WordPress emails reliably. There’s also Gravity SMTP & Postmark for sending transactional email from WordPress forms, and the Gravity Forms integration can route form notifications through Postmark.