Chris Fuhrman wrote on 01/03/2008 09:00:51 PM:

> How one does the checking on one's mailserver depends on what OS and
> mailserver it is. The wikipedia page is a good reference to start:
>
> http://en.wikipedia.org/wiki/Anti-spam_techniques_(e-mail)#DNSBLs
> http://en.wikipedia.org/wiki/Anti-spam_techniques_(e-mail)#PTR.
> 2FReverse_DNS_checks
> http://en.wikipedia.org/wiki/Anti-spam_techniques_(e-mail)#HELO.
> 2FEHLO_checking

If the mail server is Listserv Classic on Windows (which handles incoming
SMTP itself), how do I implement these checks?  I just upgraded to 15.5,
from 14.4, and I'm still reading the manuals.  I don't recall these in
prior versions, hopefully they are in the current version.