North American Network Operators Group
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Re: AOL rejecting mail from IP's w/o reverse DNS ?
- From: Petri Helenius
- Date: Thu Dec 04 17:39:54 2003
Suresh Ramasubramanian wrote:
A simple "no rDNS" rule causes too much trouble with our overseas
customers. I'm sure AOL discarded that idea for the same reason.
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?
Pete
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