[Dovecot] pop3_lock_session question

[Alan Ferrency]

> > > But I've never before heard POP3 clients behaving that way, so I'd like
> > > to know what exactly are they doing. Are they not sending anything? Are
> > > they NOOPing? I don't see any reason for them to be doing either..
> >
> > In the cases I've looked into, the client seems to be connected and
> > not doing anything.  I don't have access to the clients or end users,
> > but ktrace on the pop3 process basically is producing no output or
> > very little output over an extended period.
>
> > Could it be an interactive client which maintains an open pop
> > connection, even when no one is actively doing anything with it?
> >
> > The "unlock after a few seconds" option would be great.
> >
> > Do you have any documentation or hints on how to identify or debug
> > connecting pop clients without involving the end user?
>
> Could it be some (older?) webmail clients that use pop3 instead of imap?

I wouldn't expect a webmail client to hold a pop3 connection open
across multiple web requests.  We have standard webmail clients
available for customer use, but they use IMAP.  With the frequency
we're seeing this problem, I'd expect it's more likely to be something
newer or more commonly used.

Alan Ferrency
pair Networks, Inc.
alan at pair.com