I have postfix configured to deliver mail to dovecot over lmtp into a mailbox that then is accessed over imap. The imap server is running as the user "mail". Whenever I run "postfix flush" I get in mail.log:
Jun 12 05:37:45 li212-205 dovecot: lmtp(21288): Connect from local
Jun 12 05:37:45 li212-205 spamd[18173]: prefork: child states: II
Jun 12 05:37:45 li212-205 dovecot: auth-worker(21289): mysql(127.0.0.1): Connected to database mailserver
Jun 12 05:37:45 li212-205 dovecot: lmtp(21288, drew@REDACTED): zXAqF2lBuFEoUwAA5SnFYQ: msgid=<064C5BC7-357B-4366-9A80-5001DBA21F62@REDACTED>: saved mail to INBOX
Jun 12 05:37:45 li212-205 postfix/lmtp[21287]: 57BDA1CC932: to=<drew@REDACTED>, relay=li212-205.members.linode.com[private/dovecot-lmtp], delay=0.06, delays=0.01/0.01/0.01/0.03, dsn=2.0.0, status=sent (250 2.0.0 <drew@REDACTED> zXAqF2lBuFEoUwAA5SnFYQ Saved)
Jun 12 05:37:45 li212-205 dovecot: lmtp(21288): Disconnect from local: Client quit (in reset)
Jun 12 05:37:45 li212-205 postfix/qmgr[21244]: 57BDA1CC932: removed
Jun 12 05:37:45 li212-205 dovecot: imap(drew@REDACTED): Error: open(/decrypted-mail/awesomebox.sealedabstract.com/drew/cur/1371029865.M411903P21288.li212-205,S=2626,W=2673:2,) failed: Permission denied (euid=8(mail) egid=8(mail) missing +r perm: /decrypted-mail/awesomebox.sealedabstract.com/drew/cur/1371029865.M411903P21288.li212-205,S=2626,W=2673:2,, we're not in group 0(root))
Jun 12 05:37:45 li212-205 dovecot: imap(drew@REDACTED): Disconnected: Internal error occurred. Refer to server log for more information. [2013-06-12 05:37:45] in=349 out=1084
Indeed, the file in question is owned by root and would not be accessible to the mail user:
ls -la /decrypted-mail/awesomebox.sealedabstract.com/drew/cur/
total 24
drwxrw---- 2 mail mail 4096 Jun 12 05:37 .
drwxrw---- 7 mail mail 4096 Jun 12 05:37 ..
-rw-rw---- 1 mail mail 2616 Jun 12 05:26 1371029196.M462737P20302.li212-205,S=2616,W=2662:2,
-rw-rw---- 1 mail mail 2635 Jun 12 05:32 1371029564.M454251P20747.li212-205,S=2635,W=2682:2,
-rw-rw---- 1 root root 2626 Jun 12 05:37 1371029865.M411903P21288.li212-205,S=2626,W=2673:2,
So dutifully, I chown / chgrp to the mail user. But as soon as i receive a new mail, dovecot again creates files owned by root:root.
How do I convince it to create files as mail:mail ?
Diagnostic info:
$ dovecot --version
2.1.7
$ ps -aux | grep dovecot
root 20810 0.0 0.0 2892 984 ? Ss 05:34 0:00 /usr/sbin/dovecot -c /etc/dovecot/dovecot.conf
dovecot 20813 0.0 0.0 2620 940 ? S 05:34 0:00 dovecot/anvil
root 20814 0.0 0.1 2752 1072 ? S 05:34 0:00 dovecot/log
root 20818 0.0 0.2 4348 2524 ? S 05:34 0:00 dovecot/config
dovenull 21046 0.0 0.2 5248 2500 ? S 05:35 0:00 dovecot/imap-login
mail 21047 0.0 0.2 6392 2088 ? S 05:35 0:00 dovecot/imap
dovenull 21056 0.0 0.2 5248 2500 ? S 05:35 0:00 dovecot/imap-login
mail 21057 0.0 0.2 6752 2576 ? S 05:35 0:00 dovecot/imap
dovenull 21292 0.0 0.2 5248 2500 ? S 05:37 0:00 dovecot/imap-login
root 21293 0.0 0.1 4508 1044 ? S 05:37 0:00 dovecot/ssl-params
mail 21294 0.0 0.2 6540 2624 ? S 05:37 0:00 dovecot/imap
root 21400 0.0 0.0 4104 788 pts/0 S+ 05:51 0:00 grep dovecot
$ doveconf -n
# 2.1.7: /etc/dovecot/dovecot.conf
# OS: Linux 3.8.4-linode50 i686 Debian 7.0 fuse.encfs
auth_mechanisms = plain login
first_valid_uid = 0
mail_location = maildir:/decrypted-mail/%d/%n
mail_privileged_group = mail
namespace inbox {
inbox = yes
location =
mailbox Drafts {
special_use = \Drafts
}
mailbox Junk {
special_use = \Junk
}
mailbox Sent {
special_use = \Sent
}
mailbox "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
special_use = \Trash
}
prefix =
}
passdb {
args = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
protocols = " imap lmtp"
service auth-worker {
user = mail
}
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0600
user = postfix
}
unix_listener auth-userdb {
mode = 0600
user = mail
}
user = dovecot
}
service imap-login {
inet_listener imap {
port = 0
}
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0666
user = postfix
}
user = mail
}
service pop3-login {
inet_listener pop3 {
port = 0
}
}
ssl = required
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_key = </etc/ssl/private/dovecot.pem
userdb {
args = uid=mail gid=mail home=/decrypted-mail/%d/%n
driver = static
}