[CLUE-Tech] reverse DNS

[David Anselmi]

Charles Oriez wrote:
[...]
> since there is really no technical justification for not having valid 
> rdns on any valid server, requiring rdns to be valid on incoming servers 
> is a simple method to block the many trojaned machines

I wonder.  Do you accept any rdns, or only one matching the SMTP envelope?

I recently had this problem because Qwest had trouble setting up rdns 
for me.  But now I seem to have the problem still, because I host more 
than one domain.  The domain that matches the rdns works but others 
don't.  And sadly the checks are done after the mail is received so I 
get no bounces.

This seems to be the exception and I imagine the admins aren't terribly 
good at mail.

Dave