Karsten Fuhrmann wrote:
> Hello,
> i have a problem with some strange spam emails, which lock up my
> email reception.
> The problem is the following : I am using fetchmail to download my
> email (from a pop3 server), and fetchmail passes the email to my
> local sendmail daemon who gives it to my local imap server (cyrus).
> This works fine. But sometimes i got a spam email, which has an
> unresolveable dns origin, and this makes my sendmail crazy in a way,
> that sendmail wants to resolve but gets a timeout (around 20s). In
> the meantime the fetchmail which is actualy waiting for sendmail to
> accept the message gets a timeout from the pop server where it is
> connected to.
> Because of that timeout fetchmail stops receiving email from pop
> server and tries again next time, but next time it will start with
> the same spam email again, and it all starts again, actually no more
> new mails will arrive until i delete this particular email from the
> pop server manually.
>
> Is there a way to tweak the timeout behavior of sendmail, or maybe
> even no dns resolve option for sendmail, or even better some way to
> tell fetchmail to use the idle command to keep the connectio to the
> pop server open ?
Add this to your .mc file:
FEATURE(accept_unresolvable_domains)
and let us know how it goes.
Cheers,
Mikhail.
--
Mikhail Goriachev
Webanoide
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