Well, I haven't had this problem myself (yet), but a few things to try
might be to check your system logs, in case fetchmail is really running
into the firewall, it may leave a trace in the logs. The only part of
fetchmail that I would think would have problems w/ a firewall would be
the last stage where it feeds it to the MTA (sendmail) on port 25. But
you said you left that open explicitly. The other thing to maybe try is
to run fetchmail w/ the ' -vvv' flag for extremely verbose reporting, and
see what it says.
Monte
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