Because deliver is delivering as uid:gid and it has to change its uid. See http://wiki.dovecot.org/LDA (Multiple UIDs).
Láďa-----Original Message----- From: dovecot-bounces@dovecot.org [mailto:dovecot-bounces@dovecot.org] On Behalf Of Daniel Sent: Sunday, May 13, 2007 2:34 PM To: Dovecot Mailing List Subject: [Dovecot] dovecot deliver tries to setuid but why?
Hi!
I've set up postfix(2.4.1) + dovecot(1.0-cvs) + dovecot-lda(1.0-cvs).
Dovecot's deliver is running as vmail:vmail (according to postfix's master.cf).
Now the problem (when receiving mail): deliver(leva): auth input: leva deliver(leva): auth input: uid=8006 deliver(leva): auth input: gid=8000 deliver(leva): auth input: home=/var/mail/virtual/leva deliver(leva): setuid(8006) failed: Operation not permitted
Every virtual user has different uids, but the gid is the *same* for everyone. The gid is 8000(vmail) for everybody, and deliver runs as 8000:8000 (vmail:vmail). vmail group has write access to the users' maildirs. So why does deliver try to setuid when it has group write permission to the destination directory?
Thanks!
Daniel