nanog mailing list archives
Re: AOL rejecting mail from IP's w/o reverse DNS ?
From: Suresh Ramasubramanian <suresh () outblaze com>
Date: Wed, 03 Dec 2003 10:25:57 -0500
Christopher X. Candreva writes on 12/3/2003 10:13 AM:
Since I'm 99% sure the idea (or stupidity thereof :-) of blocking SMTP servers without reverse DNS came up here in this discussion, I just ran a manual queue run to clean out a queue, and saw this come up:
They have had this policy since several months now but it is still a "may" - and does give them a good excuse to take out large IP blocks that don't have proper reverse DNS assigned and emit a lot of spam.
More at http://postmaster.info.aol.comIf this is what it takes to push more people to get valid PTR records on their mailservers ...
I don't know if this is new -- I don't recall seeing it before, but it doesn't say they WILL refuse, just they may. If they do start blocking -- this WILL be an operational issue.
Lots of mailservers (such as the one for freebsd.org) already do this.I have not seen any large ISP other than AOL do this yet, though. However if they make it a "must" rather than a "may", I can see a whole lot of ISPs who will be quite eager to follow suit and do something on the same lines.
srs -- srs (postmaster|suresh)@outblaze.com // gpg : EDEDEFB9 manager, outblaze.com security and antispam operations
Current thread:
- Re: AOL rejecting mail from IP's w/o reverse DNS ?, (continued)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Randy Bush (Dec 03)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Adam McKenna (Dec 03)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Adam McKenna (Dec 03)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Crist Clark (Dec 04)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Adam McKenna (Dec 04)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Crist Clark (Dec 04)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Adam McKenna (Dec 04)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Adam Kujawski (Dec 06)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Christopher X. Candreva (Dec 06)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Adam McKenna (Dec 07)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Chris Lewis (Dec 04)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Suresh Ramasubramanian (Dec 04)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Petri Helenius (Dec 04)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Suresh Ramasubramanian (Dec 04)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Petri Helenius (Dec 04)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? just me (Dec 04)
- RE: AOL rejecting mail from IP's w/o reverse DNS ? Tony Hain (Dec 04)
- RE: AOL rejecting mail from IP's w/o reverse DNS ? Sean Donelan (Dec 04)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? Petri Helenius (Dec 07)
- Re: AOL rejecting mail from IP's w/o reverse DNS ? just me (Dec 07)