With a large enough userbase, misdirected spam complaints become far less of a factor. Lets put it this way .. one or two users can forget and report the same email as spam. If a whole bunch of users do that, not just a few, then either two things. 1. You have a problem or 2. There's a mass outbreak of alzheimers and all our users forgot Again - that's with a large enough userbase and with marketing content sent in bulk. Deliverability problems for lower volume is tougher to troubleshoot and it could be because of various other reasons than just complaints. --srs (mailops IS operational and belongs on nanog) On Wed, Feb 25, 2009 at 9:56 AM, Stefan Molnar <stefan@csudsu.com> wrote:
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.
------Original Message------ From: Suresh Ramasubramanian To: Micheal Patterson Cc: nanog@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@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 corporate MTA?
* 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 virus traffic
* Do you have a marketing department that might be slightly overactive?
etc etc.
srs
-- Suresh Ramasubramanian (ops.lists@gmail.com)