On 14.10.2012, at 5.07, simon.buongio...@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.
