Re: [fetchmail-users] fetchmail gets stuck because of malformed spam

[Rob M. <rob...@gm...>]

On 26/10/05, Karel Kulhavy <cl...@tw...> wrote:
> I got some malformed spam which causes fetchmail to stop on this spam
> and I am unable to download 162 waiting messages behind this spam.
>
> This seems to be some kind of fetchmail DoS vulnerability - if someone
> sends this mail to all fetchmail users in the world, they will be pretty
> pissed off to have to log in to remote machine and erase the e-mail by
> hand. And if he sends every hour, they will have to change to a
> different program than fetchmail ;-)

I've seen a similar problem before, but usually fetchmail will skip
the offending mail and carry on.  One option may be to set 501 as one
of the anti-spam codes.

> don't know how to get IMAP server greeting line

telnet IMAPHOST 143

More useful than the config dump would be the contents of .fetchmailrc
and output of "fetchmail -v -v" for the problem email (along with the
matching log entries from your MTA).

--
                 Please keep list traffic on the list.
Rob MacGregor
      Whoever fights monsters should see to it that in the process he
        doesn't become a monster.                  Friedrich Nietzsche