Hey there👋,

November's here (yep, it’s that time of the year already), and we've got updates. We added search to our developer docs, Woorise shared how Postmark became part of their core infrastructure (their words, not ours), and we found some solid reads on platform engineering, API security (our own 🙂), and the most important API trends of 2025.

>Shipped

⌘ + K

We've added search functionality to the Postmark developer documentation, so you can quickly locate the exact API endpoint, code example, or integration guide you're looking for. Whether you're setting up your first integration or troubleshooting a specific feature, just type your question and get straight to the answer. Check it out at postmarkapp.com/developer and let us know what you think.

We also added an llms.txt file

Want to know what Postmark does, fast? We created an llms.txt file that gives AI assistants a quick rundown of our product, features, and how we're different from other email services. Think of it as a cheat sheet for your favorite LLM when you're asking questions about transactional email or trying to figure out if Postmark fits your project.

>Customer spotlight

You know you have to add a customer story to the newsletter when someone says to you "Postmark has become part of our core infrastructure".

Woorise, a SaaS platform that helps businesses of all sizes generate leads and grow revenue, was tired of watching their customers' critical emails—giveaway notifications, payment confirmations, lead capture forms—get delayed or land in spam. For a platform sending thousands of emails monthly, unreliable delivery wasn't just frustrating, it was breaking trust. So they made a change.

After switching to Postmark, Woorise saw results immediately: "Emails that used to take minutes — or occasionally much longer — now land in inboxes in seconds," says Founder Christopher Vasiliou.

"Our support tickets about missing emails dropped to almost zero. We went from worrying about deliverability to trusting that every critical email will arrive quickly and reliably." 

Built something cool with Postmark lately?
We'd love to feature you in our Customer Spotlight!

>Our latest, greatest finds from around the web

Here are three pieces that caught our attention this month - each tackling a different aspect of how developers and infrastructure are evolving:

Platform Engineering Hits the Boardroom (But Nobody Can Find Anything) - Platform engineering is now a C-suite priority, but here's the irony: all those shiny Internal Developer Platforms meant to reduce cognitive load are actually making developers' brains hurt more thanks to tool fragmentation. Oops.

Lock Down Your Email Infrastructure (Before Someone Else Does) - A practical guide on securing your transactional email setup - from enabling two-factor authentication to managing API tokens and monitoring activity logs. The best time to think about security is before you need to, not after. Consider this your friendly reminder to audit those API keys sitting in your repos.

APIs Finally Get Bouncers (And They're Powered by AI) - Broken authorization is still the #1 API vulnerability, so teams are outsourcing the headache to systems like Open Policy Agent. Meanwhile, passkeys are finally ready to kill off passwords for good. RIP "Password123!"

>Meme of the month

Newsletter complete. See you next month!

Keep building amazing things,

The Postmark Team

P.S. Want to share your project? If you've built something with Postmark that solves a real problem for real people, we want to feature you. Tell us about it or just reply to this email.