Yahoo and their mail filters..
stefan at csudsu.com
Tue Feb 24 22:26:35 CST 2009
For our userbase with yahoo/hotmail/aol accouts they hit the spam button more often than delete. Then complain they do not get emails anymore from us, then want discounts on a bill of sale they missed. It is a never ending story.
From: Suresh Ramasubramanian
To: Micheal Patterson
Cc: nanog at nanog.org
Subject: Re: Yahoo and their mail filters..
Sent: Feb 24, 2009 7:59 PM
On Wed, Feb 25, 2009 at 9:23 AM, Micheal Patterson
<micheal at spmedicalgroup.com> wrote:
> SPF records aren't being recognized, I've been running them for some time
> now so it would seem that they're not honoring them.
Christ .. Yahoo did say "complaints". And it can take a very low
level of complaints before a block goes into place - especially for
low volume (corporate etc) mailservers.
Feedback loops are one cure, and another cure is keeping complaint volumes down.
* Do you have an unfiltered NAT gateway pointed to the same IP as your
* Do you have any large spam sources in close proximity to you? Like
you are colo'd on a /28 and someone else has a /27 or /26 in the same
/24 that's emitting tons of spam (assuming colo). Or you have your
mailserver hosted on a dsl pool (even a business class dsl pool) in
which case your server is an island of valid mail in a large swamp of
* Do you have a marketing department that might be slightly overactive?
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