valid reverse DNS now required to mail an AOL user

Given that something like 8.13% of of the hosts that have sent non-spam mail to me do not have reverse DNS information recorded, the fact that AOL have just switched this on as a requirement will be interesting:

: jm ftp 1019...; dig aol.com mx
aol.com.                3559    IN      MX      15 mailin-01.mx.aol.com.
mailin-01.mx.aol.com.   92      IN      A       152.163.224.26
...
: jm ftp 1020...; telnet 152.163.224.26 25
Trying 152.163.224.26...
Connected to 152.163.224.26.
Escape character is '^]'.
220-rly-za01.mx.aol.com ESMTP mail_relay_in-za1.6; Thu, 22 May 2003
15:09:54 -0400
220-America Online (AOL) and its affiliated companies do not
220-     authorize the use of its proprietary computers and computer
220-     networks to accept, transmit, or distribute unsolicited bulk
220-     e-mail sent from the internet.  Effective immediately:  AOL 
220-     may no longer accept connections from IP addresses which 
220      have no reverse-DNS (PTR record) assigned.
^]
telnet> q
Connection closed.

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One Comment

  1. Posted October 8, 2009 at 17:09 | Permalink

    thank you..