Engineering notes

Technical write-ups from building getalias.email — an EU-hosted email forwarding service written in Clojure, running on Postfix. Bugs, edge cases, and how we fixed them.

2026-05-27

The magic link that gets burned before your user clicks it

Enterprise mail-security scanners issue automated GET requests on every link in inbound mail. A single-use magic link consumed on GET is dead before the human arrives. The fix: split it so GET confirms and POST consumes.