[Dovecot] BUG: Authentication client sent unknown handshake command

[Timo Sirainen]

On 16.4.2014, at 17.48, Jean-Yves Moulin <jym at baaz.fr> wrote:

> After a kernel upgrade, while using the same dovecot binaries (they were working perfectly until today), I'm experiencing this error (more log at the end of my email):
> 
> BUG: Authentication client sent unknown handshake command: REQUEST?227672066?18807?2?c717631d60216b2e9ec57a2fa69674b8?session_pid=16343?...
> 
> I tried to build a newer version of dovecot (2.2.12) but same issue.
> 
> I know this should come from my system and not dovecot, but how can I debug this kind of problem ? I already enabled various debug (auth_verbose, auth_debug, mail_debug) but I need more information.

I think Dovecot's net_getunixname() no longer works correctly, meaning NetBSD's getsockname() no longer returns the socket name correctly for UNIX sockets. Should be fixed on NetBSD's side.