[Dovecot] Duplicate E-mail Problem

[Phillip T. George]

Timo Sirainen wrote:
> On Fri, 2007-04-13 at 09:10 -0500, Phillip T. George wrote:
>   
>> Anyway, I'm having a problem, that may or may not be related to 
>> Dovecot.  Specifically, duplicate (and sometimes triplicate) emails are 
>> appearing.  These emails have exactly the same queue ID, so its not that 
>> they were sent multiple times.  These dup emails do not show up to me ever.
>>     
>
> What kind of filenames do they have in maildir? Do you see anything in
> Dovecot's error logs? The only reason why Dovecot would internally
> duplicate messages is if it detects multiple filenames with same base
> name, which aren't hardlinks to each others. And that could happen if
> the maildir filenames aren't truly unique. You said you're using
> Procmail, are you sure you're not using MH filenames
> (http://wiki.dovecot.org/MailboxFormat/Maildir)?
>
> If that's not the problem, you can enable mail_log plugin and check if
> it logs that the client does a duplicate COPY.
> http://wiki.dovecot.org/Plugins/MailLog
>   
Here's a snippet from the procmail log file:
procmail: Assigning 
"LASTFOLDER=/home/domain.com/homes/user/Maildir/new/1176426436.9170_1.east.domain.com"
procmail: Notified comsat: 
"user.domain.com at 0:/home/domain.com/homes/user/Maildir/new/1176426436.9170_1.east.domain.com"

I do not see any errors near the time the duplicate messages occurred.

In /etc/postfix/main.cf :
home_mailbox = Maildir/
mailbox_command = /usr/bin/procmail -a "$EXTENSION"

I'll try enabling the mail_log plugin.

Thanks,
Phillip