[78278] in North American Network Operators' Group

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

daemon@ATHENA.MIT.EDU (Robert L Mathews)
Sat Feb 26 17:24:28 2005

Date: Sat, 26 Feb 2005 14:24:00 -0800
From: Robert L Mathews <lists@tigertech.com>
To: nanog@merit.edu
In-Reply-To: <g3ll9dzigc.fsf@sa.vix.com>
Errors-To: owner-nanog@merit.edu


Paul Vixie wrote:

> well, in sbc-dsl-land, port 25 and port 587 are blocked, but port 26 gets
> through.  it seems bizarre that port 587 would ever be blocked

I suspect that was some kind of temporary aberration. SBC started 
blocking port 25 in the last two months, and during that time I've 
helped at least a dozen of our customers using SBC DSL switch their mail 
program settings from port 25 to port 587, with no trouble -- it worked 
in every case.

I bet it works if you try it again now (as you say, blocking port 587 
makes no sense).

-- 
Robert L Mathews

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