> On 27 May 2025, at 02:24, Matteo Bini <matteo...@tiepi.it> wrote: > > Hello everyone, > first time poster here. I've decided to set my LUG mail server up with > OpenSMTPD, because its configuration syntax it's clear and short and > because it's one of the most minimal/suckless SMTP daemon I know. > > I trying to avoid From header spoofing when messages come from local > users connected through Unix socket. When connections come from outside > I'm able to achieve this with the senders option [1] of the listen on > interface command [2]. > > How do you prohibit local users from changing the From header with > OpenSMTPD? The LUG server runs on Debian GNU/Linux 12 "bookworm". > > Thank you very much for your help and for writing such a wonderful > program.
It seems that OpenSMTPD doesn't support this feature currently. See https://github.com/OpenSMTPD/OpenSMTPD/issues/709 I'm also looking forward to a solution for this problem. -- Ziqin
