[Mimedefang] Spammers who won't take no for an answer

[Kayne Kruse]

I get several attempts per hour here.  I've noticed tho that some variables change mostly the sender. 

> From: David F. Skoll 

> Is anyone seeing a new trend (maybe a new ratware package?)  
> I'm seeing
> spammers repeatedly retry the same message, even after a 5xx 
> failure code.