Observed arrival · 2026-08-22
OpenIMAPD Wants to Be the Small, Honest IMAP Server
An actively developed IMAP4rev2 server written from scratch in C for OpenBSD, with a deliberately narrow scope and strong privilege separation.
Why it surfaced
OpenIMAPD is already receiving mail on a bare-metal OpenBSD machine, but remains pre-release and has no tagged release yet. Its author details a security-conscious architecture using separate processes, chroot, pledge(2), unveil(2), fuzzing, and two security reviews—an unusually candid progress report for a mail server.
An actively developed IMAP4rev2 server written from scratch in C for OpenBSD, with a deliberately narrow scope and strong privilege separation.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue