On Tue, 29 Jan 2008, Anne Wilson wrote:
I have a problem and I don't know which part of the mail chain could be
causing it, although dovecot does seem to be the most logical source.
I get multiple copies of messages to my Inbox. I have just deleted 24 copies
of a newsletter from Computer Shopper. The worst example I have seen of this
had more than 90 copies. This doesn't happen to any subfolder of Inbox, just
Inbox itself.
The problem started about 10-14 days ago, on the old mail server (running
Mandriva 2007.1). The new server runs CentOS and exhibits the same problem.
I'd be interested in any comments, as my efforts to track it down have got
nowhere.
Are you using Dovecot's 'deliver' as your LDA (local delivery agent)?
Otherwise I'd suspect the problem lies in whatever you're using for your
local deliveries, creating some kind of mail loop. Check your
.forward/.qmail/.procmail/whatever files. I haven't heard of/seen dovecot
duplicating messages unless there are actually multiple copies in your
mailbox.
If your LDA isn't already doing so, add a 'Delivered-To' or 'X-Mail-Loop'
header at each stage, so you can more easily tell if this is what's
happening. And then (I assume you've done this, but it should be said)
look at the headers of the duplicated messages to see if they're 1)
actually distinct messages [external problem] 2) being delivered multiple
times
Best,
Ben
