About this blog

Every programmer's first program prints hello, world. Every email conversation starts with a server saying HELO. We build email infrastructure, so the pun wrote itself.

This is where the engineering team at Mailprotector writes about the work. We process a lot of mail for managed service providers and their clients, and the systems that do it are old in the good way: SMTP has been around since 1982, and most of it still runs the world. We spend our days making that machinery faster, safer, and quieter.

You'll find war stories from the mail edge, deep dives into spam and authentication, notes on how we test and ship, and the occasional post about a bug that cost us a weekend. We write the posts we wish we'd found when we hit the same problem.