[cobalt-users] spam

[Kameel <kameel@xxxxxxxxxxxxxxx>]

Heya Folks,

One of my domains on my raq has started to get *alot* of returned mail.
I've checked the message headers and none of the mail was sent my box.
The originating IP's appear lots of different DSL boxes in the uk/europe.
Someone is sending out spam and the return path has my domain specified at 
the end.

The problem is with all this mail is getting returned to me, it's eating up 
my bandwidth needlessly, but I'm more worried about my IP getting blacklisted !
Is there a way to stop this ?

I can't think of one seeing as the email is not originating from my machine...

Any ideas would be much appreciated.
Thanks,
Kam.