North American Network Operators Group

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Re: Why do so few mail providers support Port 587?

  • From: Edward B. Dreger
  • Date: Fri Feb 25 17:55:09 2005

jm> Date: Fri, 25 Feb 2005 14:25:48 -0800 (PST)
jm> From: just me

jm> What are you, stupid? The spammers have drone armies of machines
jm> with completely compromised operating systems. What makes you think
jm> that their mail credentials will be hard to obtain?

Internal users:  With AUTH - correlate message with authenticated user,
then forbid mail transmission for them only.  I'd rather do that than
slog through RADIUS logs.  But, hey, maybe if I had more free time...

External users:  They must send mail somehow.  If saying "You roam? Use
this port!" is too difficult, try explaining multiple profiles.  Short
of using 25/TCP on the service provider's network (which could be
amusing for those using wholesale dialup providers), users need some way
to pass email.

Everquick Internet -
A division of Brotsman & Dreger, Inc. -
Bandwidth, consulting, e-commerce, hosting, and network building
Phone: +1 785 865 5885 Lawrence and [inter]national
Phone: +1 316 794 8922 Wichita
DO NOT send mail to the following addresses:
[email protected] -*- [email protected] -*- [email protected]
Sending mail to spambait addresses is a great way to get blocked.
Ditto for broken OOO autoresponders and foolish AV software backscatter.