Eternal message
 

Hey, I'm new to Linux, but have recently inherited a Linux mail server on the network I administer. I have an email that is continually being bounced around, and is filling up our server.

The email looks like a reply, but the address specified in an invalid address. Now, the message itself I know is a "spam," as is the address "merchantworlds2001@juno.com."

How do I stop this message from trying to send itself?

More info
 

I think, maybe, that this email might be spam. Well, okay, I *know* this email is spam, but I think it might be using our server to send itself to others. If so, how would I stop this?