Another ISP Plans to Move to Port 587 for Mail Submission

[David Farber <dave () farber net>]

Begin forwarded message:

From: "Livingood, Jason" <Jason_Livingood () cable comcast com>
Date: February 17, 2009 12:39:09 PM EST
To: Dave Farber <dave () farber net>
Subject: Another ISP Plans to Move to Port 587 for Mail Submission

Dave – May be of interest to IP.

The author of this is Brian Krebs, who broke the McColo spam story a  
few months ago ( http://voices.washingtonpost.com/securityfix/2008/11/major_source_of_online_scams_a.html) 
.  Brian is giving the keynote of the Messaging Anti-Abuse Working  
Group meeting that I am attending today in San Francisco (http://www.maawg.org 
), and today has an interesting story about the increasing move of  
ISPs to use port 587 as the email submission port.

Story URL: http://voices.washingtonpost.com/securityfix/2009/02/verizon_to_implement_spam_bloc.html

A good standards reference here is RFC 5068 / BCP 134 ( http://www.ietf.org/rfc/rfc5068.txt) 
.  There seems to be more and more momentum to using port 25 just on a  
mail server to mail server basis, and port 587 for mail client  
submission to mail servers.

Regards
Jason Livingood




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