At 22:40 +0200 on 05/30/2005, Markus Stumpf wrote about Re: MTAMARK
(was: SPF I-D for review: draft-schlitt-spf-cla:
I have never seen a "legal" mailserver running on a dynamically changing,
DHCP provided IP address before.
I have. My Connectivity provider Optimum Online (OOL) [AKA
Cablevision] offers "Business Class OOL" (BOOL) to Bussinesses at a
higher price than "Residential" OOL. The only difference other than
the cost is that a BOOL User is allowed to run SMTP/POP/IMAP Servers.
The actual IPNs are DHCP Supplied and (apparently) come from the same
pool as the OOL IPNs. I am not sure how the rDns is handled (ie: If
the mapping is to a Name in the Business's Domain or not and if it
gets updated when the IPN gets updated). I think that the Business
still needs dynamic DNS updating when the IPN changes but that does
not help the x.x.x.in-addr.arpa issue.