dovecot - Oct 2012 - POP UIDL

Hi

I run a small mail server with Dovecot and postfix. Several of the accounts are
popped by an external email provide I use, mostly out habit and also for a bit
of redundancy. I have no details on that external server except that it uses
exim.

Lately, it's been repopping mail from accounts (mail is left on the server
so I can use IMAP) at fairly frequent, but undetermined, intervals. Before I
take it to them, I want to be sure it's not an error on my side. How can I
be sure Dovecot does not have a problem with the UIDL list causing this external
server to repop the mail?

For the record, I'm not inclined to think it's a Dovecot issue, but
since that's the bit I can fix, I'd like to be sure.

Cheers

Simon

On 14.10.2012, at 5.07, simon.buongiorno at gmail.com wrote:
> I run a small mail server with Dovecot and postfix. Several of the accounts
are popped by an external email provide I use, mostly out habit and also for a
bit of redundancy. I have no details on that external server except that it uses
exim.
> 
> Lately, it's been repopping mail from accounts (mail is left on the
server so I can use IMAP) at fairly frequent, but undetermined, intervals.
Before I take it to them, I want to be sure it's not an error on my side.
How can I be sure Dovecot does not have a problem with the UIDL list causing
this external server to repop the mail?
> 
> For the record, I'm not inclined to think it's a Dovecot issue, but
since that's the bit I can fix, I'd like to be sure.
dovecot -n output would have helped. Anyway, some POP3 clients become confused
if there are duplicate UIDLs. Recent v2.1 versions have a pop3_uidl_duplicates
setting to avoid those.