Re: Trying to find out cause of blacklisting

James wrote on Sat, 13 May 2006 13:58:16 -0400:

> My guess is that it's this 6-15 email sent to non-existent users 
> that's the cause of most problems.  In fact, until this blacklisting, 
> it hasn't seemed to be that big an issue.

If the inbound mail is being sent to non-existent users then it 
shouldn't even get to the stage where it's filtered by SA and CAV.
If your MTA isn't capable of rejecting such mail outright then you 
*really* need to start using a different MTA. There really is no excuse 
for an MTA to allow an SMTP session to get past the RCPT TO: stage if 
there is no such address.