On Tue, 7 Sep 2004, Chris Blaise wrote:
In terms of a reverse record, you can only have ONE PTR per ip, on a mail server that may handle hundreds of domains. SPF is *certainly* valid in this regard, as sort of a finer-grained PTR.
-Dan
Another reason for SPF/SenderID vs. PTR records is unfortunately while technically possible to delegate, many ISPs don't allow their customers to manage the reverse records.
Chris
--
"Tonite on reboot! People misspelling as many words with sexual connotations as possible..."
-Keyo-Chan, February 10th 1999, Undernet #reboot
--------Dan Mahoney-------- Techie, Sysadmin, WebGeek Gushi on efnet/undernet IRC ICQ: 13735144 AIM: LarpGM Site: http://www.gushi.org ---------------------------
