[CentOS] OT Mailing List Spam

> 
> And what are they going to do, spam people with Yahoo's auto 
> reply? It's not like it's an open relay. Possible it could be 
> used for a DOS attack, but not for spamming.
> 

Spoof the return headers and send a million or two mails to abuse at yahoo just
for fun....if the responder also includes the message then the spam is done
as a million autoreplies are sent out to people who never sent them..