North American Network Operators Group

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

  • From: Petri Helenius
  • Date: Wed Dec 03 11:34:54 2003

[email protected] wrote:

Proper configuration of in-addr.arpa is a "good idea" TM.
However, it isn't the right way for large mail server operators
to go. Instead, they should start exchanging their SMTP sessions
on a port other than 25, i.e. NIMTP (New Improved MTP). The NIMTP
servers would not accept incoming connections from unknown servers.
In order to join the club, you would have to certify that you will
only send mail from known senders or relay mail from organizations
which will make the same certification. In this way, we create an
overlay mail transport network in which the members have some sort
of one-to-one mail peering relationship that allows them to enforce
an AUP on each other as well as maintain good contact info.


The system exactly like you describe already exists. Itīs based on the standard
X.400 protocol and is available across the world. Or in some parts, used to
be. If that approach would be highly successful, why would it not prosper
instead of SMTP today?

Pete