Yahoo and their mail filters..

Stefan Molnar stefan at csudsu.com
Tue Feb 24 21:23:21 CST 2009


They are accepting them by the 250 code, but never endup on the user mailbox.  This was just within the last week. 

Fun Fun

------Original Message------
From: Micheal Patterson
To: nanog at nanog.org
Subject: Yahoo and their mail filters..
Sent: Feb 24, 2009 6:27 PM

This may be old news, but I've not been in the list for quite some time. At 
any rate, is anyone else having issues with Yahoo blocking / deferring 
legitimate emails?

My situation is that I host our corporate mx'ers on my network, one of the 
companies that we recently purchased has Yahoo hosting their domains mail. 
Mail traffic to them is getting temporarily deferred with the "421 4.7.0 
[TS01] Messages from xxx.xxx.xxx.xxx temporarily deferred due to user 
complaints - 4.16.55.1;
see http://postmaster.yahoo.com/421-ts01.html"

The admin of the facility has contacted Yahoo about this but their response 
was for "more information" when they were told that traffic from my mx to 
their domain was to being deferred.  I may end up just having them migrate 
to my systems just to maintain company communications if we can't clear this 
up in a timely manner.

--
Micheal Patterson








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