[Gllug] Handling a new twist by spammers

[John Winters]

One of my machines functions as a secondary mail server (running Exim). 
I notice this morning that it has a large number of frozen messages and
looking at them I find a new twist to the nuisance of spammers.

Someone has been sending a large number of e-mails to randomly generated
addresses, (like "fred101 at linuxemporium.co.uk",
"fred102 at linuxemporium.co.uk" etc.) and then sending them to the
*secondary* mail server.  It accepts them because it doesn't know any
better, then tries to pass them on, fails, tries to send them back to
the originator, fails again and then freezes them.

It looks either like incompetence or a half-baked DoS attack.  Is there
anything that can be done to prevent this trick?

TIA,
John

-- 
The Linux Emporium - the source for Linux in the UK
See http://www.linuxemporium.co.uk/

We had a woodhenge here once but it rotted.


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