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Re: AOL rejecting mail from IP's w/o reverse DNS ?
Petri Helenius writes on 12/4/2003 5:36 PM:
I would refer you to the huge number of netblocks out there that stay at /16 or larger size, with the upstream not SWIP'ing or otherwise delegating netblocks in APNIC (or wherever, such as an rwhois server) as they provision IPs.Yup. The model can be extended to "if no rDNS, and if spamtrap hits or other spammish behavior noted from more than X IPs per /24, then block the /24".And why would blocking the /24 be appropriate instead of matching the registry?
srs (postmaster|suresh)@outblaze.com // gpg : EDEDEFB9
manager, outblaze.com security and antispam operations