We've completed our migration from PowerMTA to KumoMTA, an open-source, high-performance mail transfer agent (MTA). Every email Postmark sends now runs through KumoMTA. It's the biggest infrastructure change we've made in years, and it sets the stage for everything we want to build next.
Continue reading • Alex Burch wrote in Engineering
Today, we're releasing Postmark Skills, a set of open source Agent Skills that teach AI coding agents how to work with Postmark correctly.
Continue reading • Postmark team wrote in Product news
Recently, we made some behind-the-scenes improvements to how Postmark generates unsubscribe links. And while you might not have noticed anything different, these changes are helping your emails land in more inboxes.
Continue reading • Postmark team wrote in Product news
Getting an AI assistant to help with your email integration shouldn't feel like explaining SMTP to your cat. We've shipped three updates to make AI tools like ChatGPT and Claude genuinely useful when you're working with Postmark: an llms.txt file for accurate API context, pre-built integration prompts, and an MCP server that lets AI assistants actually send emails and check stats.
Continue reading • Postmark team wrote in Product news
Your Postmark API tokens are the keys to your email kingdom. One exposed token can mean unauthorized access to your account, potential data breaches, and a whole lot of stress you don't need. The good news? Keeping your account secure doesn't have to be complicated.
Continue reading • Postmark team wrote in Engineering
