Hello.
I have
- dovecot 2.3.21 (also tried 2.3.5)
- postfix 3.8.5 (also tried 3.8.4)
It's a new setup where I use postfix + dovecot-delivery for delivery to
local mailbox. At logs I have an error and mail deffers in queue:
dovecot: [ID 702911 mail.crit] lda(poli(a)domain.com)<7808>: Fatal: We
couldn't drop root group privileges (wanted=6(mail), gid=0(root),
egid=0(root))
Postfix and dovecot start from root UID, but user dovecot/postfix has
corresponding groups to run as specific group:
root@solaris:# id -a dovecot
uid=110(dovecot) gid=110(dovecot) groups=110(dovecot),6(mail)
root@solaris:# id -a postfix
uid=26(postfix) gid=26(postfix) groups=26(postfix),6(mail)
root@solaris:# id -a root
uid=0(root) gid=0(root)
groups=0(root),1(other),2(bin),3(sys),4(adm),6(mail),7(tty),8(lp),12(daemon)
Also, when I run a dtrace (a system call trace mechanism) I see, that
dovecot-lda runs as group "mail" (gid=6), so, there isn't any problem,
but dovecot thinks another:
UID GID PID PPID ARGS
0 26 7719 7638 pipe -n dovecot -t unix flags=DRhu
user=nobody:mail argv=/usr/libexec/dovecot/d
60001 6 7720 7718 /usr/libexec/dovecot/dovecot-lda -f
mega(a)domain.com -d poli(a)domain.com
60001 6 7720 7718 /usr/bin/amd64/doveconf -f service=lda -c
/etc/dovecot/dovecot.conf -m lda -e /
60001 6 7720 7718 /usr/libexec/dovecot/dovecot-lda
-f mega(a)domain.com -d poli(a)domain.com
What exactly dovecot wants and how to solve this error?
Here is part of "dovecot -n" output which is corresponding to
user/group/lda:
# 2.3.5.1 (7ec6d0ade): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.6 (92dc263a)
# OS: SunOS 5.11 i86pc
# Hostname: solaris
auth_debug = yes
auth_mechanisms = plain login
auth_verbose = yes
default_process_limit = 99
disable_plaintext_auth = no
first_valid_gid = 6
first_valid_uid = 60001
last_valid_gid = 6
last_valid_uid = 60001
mail_access_groups = mail
mail_debug = yes
mail_gid = 6
mail_location = /var/mail/vmail/%u@%d
mail_max_userip_connections = 99
mail_privileged_group = mail
mail_uid = 60001
maildir_very_dirty_syncs = yes
...
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0666
user = postfix
}
}
...
protocol lda {
mail_plugins = " sieve"
postmaster_address = postmaster
}
PS. Also, I have aother box with very old setup (dovecot 2.2.27) and it
works with the same configuration without any errors. I thought that
this is OS specific problem and tried on the same version OS run a
dovecot 2.3.21, but still had an errors.