Is there an RFC detailing that specific text strings must be used for static v. dynamic addresses? I can understanding keeping rDNS in sync, but that's not the issue here, is it? On Wed, Dec 9, 2009 at 11:57 AM, William Herrin <herrin-nanog@dirtside.com>wrote:
On Wed, Dec 9, 2009 at 10:18 AM, Sven Olaf Kamphuis <sven@cyberbunker.com> wrote:
We've noticed that Trend Micro "mail-abuse.com" just "assumes" ips are dynamic by default,
because they just assume that working, rfc compliant, reverse dns that just-so-happens to be automatically generated would indicate dynamic ip space.
Sven,
Which is it? By default or because it looks automatically generated?
By default would seem to be a problem. Automatically generated, not so much.
If you haven't made the effort to set up and secure a mail server then you shouldn't be talking smtp to the hosts mail-abuse.com is used to protect. If you haven't bothered to set the reverse DNS to match your server's name then you haven't made the effort, at least not with a modicum of competence.
Regards, Bill Herrin
-- William D. Herrin ................ herrin@dirtside.com bill@herrin.us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004