At 04:02 PM 1/24/2005 -0500, Greg Connor <gconnor(_at_)nekodojo(_dot_)org>
wrote:
ObSPF: this check doesn't have anything to do with HELO, but I have
considered using a HELO PASS to override a rDNS failure. That would give
folks the ability to hand me a name that I *can* confirm. It might help in
cases where the mailserver admin has his own domain name but can't control
the rDNS...
--
Greg Connor <gconnor(_at_)nekodojo(_dot_)org>
****************** REPLY SEPARATER ********************
That is exactly the case. It took me almost a year to get our upstream ISP
to change the reverse lookup to <mail.yellowhead.com>. And then they only
changed it because we went to a new IP range at their request.
Because of relentlous bounces due to a spammer using our FQDN, I had to
change the mail server name. I certainly hope it doesn't take another year
to change the reverse lookup again, but that is indicative of the relative
importance of reverse lookup. I really believe that it is an obsolete
protocol because it is not directly controlled by the domain owner, and
upstream ISP's just don't seem to give a dam. I can change it on my own DNS
server, but unfortunately that's not what the outside world sees. Even with
a full "C" class network, they would not provide secondary reverse lookup.
J.A. Coutts