little off topic: Am I an open relay?

[Beat Jucker]

> I had a similar situation just last week. It had to do with some kind of setup
> on a user's Thunderbird. A friend of this user told him how to set up
> Thunderbird to act as a relay for a different domain than ours, and for some
> reason, because it was being done from our IPs, sendmail would go merrily along
> and send it, even though it wasn't supposed to. 

In my opinion each domain (company) should take care that only well
known mailservers in their domain should be able to take the role of
a relay mailserver (eg controlled by firewall). This will prevent   
many virus/spam distributions

Regards
-- Beat

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