If you need to send emails from an application, it’s a good idea to think about how your usage changes over time. As with many technology choices, there’s a tradeoff between up-front efficiency and long-term flexibility. You have two main choices for sending emails through your Python application. The first is SMTP — the standard protocol for outgoing email. The…
Postmark
https://postmarkapp.com/blog · 10 posts · history since 2025 · active
29 Apr
31 Mar
If you've been sending email through Postmark lately, your messages have been moving through an entirely new engine (and you probably didn't notice a thing). That's exactly how we wanted it. 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…
27 Feb
If you've ever asked an AI coding agent to help you integrate email into your app, you've probably gotten code that looks right but isn't quite right. Maybe it used an outdated endpoint. Maybe it forgot about Message Streams entirely. Maybe it hallucinated a method that doesn't exist. (We've seen all three.) AI agents are only as good as the…
29 Jan
If you've been sending emails for a while, you know that deliverability can feel like a moving target. Inbox providers are constantly tweaking their rules, and what worked yesterday might cause problems tomorrow. 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…
24 Nov 2025
Getting an AI assistant to help with your email integration shouldn't feel like explaining SMTP to your cat. But until recently, that's kind of what it was like - AI tools could tell you about email APIs, but they often got the details wrong or gave you outdated information. We've been thinking about this problem, and we've shipped three updates…
21 Oct 2025
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. This guide covers the essential practices that'll help you sleep better at night, knowing your…
25 Sept 2025
We recently became aware of a malicious npm package called "postmark-mcp" on npm that was impersonating Postmark and stealing user emails. We want to be crystal clear: Postmark had absolutely nothing to do with this package or the malicious activity. Here's what happened: A malicious actor created a fake package on npm impersonating our name, built trust over 15 versions,…
6 Aug 2025
After hearing your feedback loud and clear, we've redesigned our 10,000 email/month plans to match how you work. You told us: "I need these features, but I don't need to pay for volume I'm not using." "For side project developer and hobby engineering enthusiast, like me, the latest plan that offers 50,000 mails at $60.50 per month is too expensive."…
24 Jul 2025
Meet Rens Wolters from PartyRens, who decided that controlling a Game Boy Advance emulator through email wasn't just possible but absolutely necessary. PostmarkGBA is what happens when a developer's weekend project meets genuine ingenuity, and we had to know more. We caught up with Rens to understand how this beautiful chaos came to life. This is the actual setup that’s…
1 Jul 2025
When we launched the Postmark Challenge: Inbox Innovators on DEV Community, we expected clever solutions. What we got were projects that completely reimagined what email could do. Developers didn't just parse emails, they turned inboxes into gaming platforms, AI transcription services, environmental monitoring systems, podcast distribution channels, and automated code review systems. Each submission reminded us why email remains one…