[Mimedefang] Discarding fake MXs

[Kenneth Porter]

--On Monday, March 22, 2004 7:49 PM -0600 Ben Kamen <bkamen at benjammin.net> 
wrote:

> Well, we do that for a reason... it sends spammers to the next
> (unreachable) MX point after failing to send spam to the primary. I used
> to use 127.0.0.1 - but people like SBC block incoming mail if the
> remote's have any MX's set like that (poo!)...

I've started using a real address in my net block that I know is not in use 
and won't have a mail server listening. Do any spammers search backwards 
and use the first listening server? In that case, this will cause the first 
TCP connection attempt to time out, which should chew into their resources.