[Dovecot] UIDL question

Jase Thew bazerka at beardz.net
Thu Nov 27 21:31:51 EET 2008

Wouter van der Schagt wrote:
> Hi all,
> I'm migrating a Postfix + Dovecot 1.0 server with mboxes to Qmail + Dovecot
> 1.4 with Maildirs and encounter the following the problem.
> Using perfect-maildir.pl from: http://perfectmaildir.home-dn.net/ i can
> relatively succesfully convert the mbox to a Maildir. The problem, however
> is that clients with "leave mail on server" set to on retrieve all email a
> 2nd time.
> I understand this must be because the email client "sees" a different UIDL
> and downloads the message again. Looking at the 1.0 configuration, i do not
> see a "pop3_uidl_format" setting. So was wondering how the UIDL is
> generated.
> Is anybody aware of a conversion script that properly maintains the UIDL? Or
> am I misisng something else here?


Please look at http://wiki.dovecot.org/Migration/MailFormat

There's a modified version of mb2md.pl there that will keep the existing 
UIDL info.

As for "pop3_uidl_format", I seem to recall the source needing 
modification to change the format in earlier versions of Dovecot, until 
it was added as a configuration option.

OT: I'm curious as to why you're migrating from Postfix to Qmail.



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