[Dovecot] Duplicate E-mail Problem

Phillip T. George Phillip at StellarDreams.com
Fri Apr 13 17:40:45 EEST 2007

Hmm.  Thats interesting.  The thing is, its only happening for one user 
that I'm aware of.  Also, I probably should of mentioned that I'm using 
Maildir ... I'm sure that changes things :)


Stewart Dean wrote:
> When this happens with sendmail, it can be that the queue handler 
> doesn't finish before a new queue handler is kicked off, so each 
> successive queue handler/runner ends up sending the same mail.
> Background: sendmail, and perhaps postfix, is configured to a) toss 
> stuff it can't handle right away into the queue and then, every so 
> often (interval to be set by admin), it burps the queue.  If the 
> interval is too short, the previous queue handler/runner doesn't 
> complete before a new one is invoked and gets it list of things to 
> mail...with the same email on both queue handler/runners incarnations 
> to do list...........
> Phillip T. George wrote:
>> Hello all,
>> Definitely congrats on the 1.0.0 release!
>> 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.
>> Postfix is being used as the SMTP, and it hands it over to procmail.  
>> I set up procmail's verbose logging feature for that user and on the 
>> duplicate emails that he receives, it shows only ONE write to a file 
>> for that specific subject of email.  Tonight / this morning I'll be 
>> tracking down to see if this duplicate for sure happens in IMAP.
>> Note: Its possible that part of the problem is he leaves two IMAP 
>> clients open at the same time (Netscape I think).  I'm going to 
>> verify that with him.
>> Any ideas?  I'm NOT trying to blame Dovecot, I'm just trying to 
>> explore options.  Right now its looking fairly bad for Dovecot 
>> though....I mean, what else is there after the mail is delivered to 
>> the appropriate place in the mailbox?
>> Software versions:
>> postfix 2.3.8
>> procmail 3.22
>> dovecot 1.0.rc28
>> Thanks,
>> Phillip

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