dovecot - Jan 2011 - Can I get rid of the fchown log messages?

Hi,

Since upgrading dovecot version (from somewhat ancient to 1.2.16), I see 
messages in the logs like these:

Jan 15 00:55:17 srv0303 dovecot: POP3(obm03):
fchown(/home/obm/obm03/mail/.imap/INBOX/dovecot.index.tmp, -1, 8(mail)) failed:
Operation not permitted (egid=1033(obm), group based on /var/mail/obm03)

I know that this is because the mailbox in /var/mail has ownership 
username:mail.
However, in this setup this is intentional, and quota-related (quota on 
inbox is enforced by Exim, not Dovecot, and kernel does group-quota but 
not for group mail). Also, group read rights for group mail are 
intentional.
>From what I read on this list, it has something to do with shared folders. 
I did not (at least it wasn't my intention) configure users' inboxes as 
shared folders.

So, is there a way to disable these log messages, or, to disable Dovecot's 
attempts to try to change the owner/group of the index/cache/log files 
when these are inside the user's private ~/mail folder?
More specifically, is there a way to do this without changing anything to 
users' inbox permissions?


Thanks,

Maarten

On Sat, 2011-01-15 at 01:42 +0100, Maarten Bezemer wrote:
> Jan 15 00:55:17 srv0303 dovecot: POP3(obm03):
fchown(/home/obm/obm03/mail/.imap/INBOX/dovecot.index.tmp, -1, 8(mail)) failed:
Operation not permitted (egid=1033(obm), group based on /var/mail/obm03)
> 
> I know that this is because the mailbox in /var/mail has ownership 
> username:mail.
> However, in this setup this is intentional, and quota-related (quota on 
> inbox is enforced by Exim, not Dovecot, and kernel does group-quota but 
> not for group mail). Also, group read rights for group mail are 
> intentional.
It's fine to have mail as the group, but does the group really need to
have read or write permissions? chmod 0600 /var/mail/* would solve this.

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