AOL rejecting mail from IP's w/o reverse DNS ?

Steven M. Bellovin smb at
Wed Dec 3 19:27:02 UTC 2003

In message <01D22399-25C5-11D8-940C-000A956885D4 at>, Matthew Crocker 

>AOL says the PTR record needs to be assigned.  It doesn't specify it 
>has to match the in the MAIL FROM: header.  Wouldn't it be 
>enough to make sure every IP address you announce has a PTR and 
>matching A record?  Hasn't this been a requirement for MANY services 
>for MANY years?

Right -- and then folks will start creating wildcard PTR records...

		--Steve Bellovin,

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