[103673] in North American Network Operators' Group
RE: Problems sending mail to yahoo?
daemon@ATHENA.MIT.EDU (Raymond L. Corbin)
Thu Apr 10 16:02:40 2008
From: "Raymond L. Corbin" <rcorbin@hostmysite.com>
To: Chris Stone <cstone@axint.net>, "nanog@merit.edu" <nanog@merit.edu>
Date: Thu, 10 Apr 2008 15:28:17 -0400
In-Reply-To: <47FE5319.10609@axint.net>
Errors-To: owner-nanog@merit.edu
Hello,
I have had to tell some dedicated server clients that they will need to dis=
able their forwards to Yahoo or add something like postini for those accoun=
ts that forward to Yahoo...It generally works...however Yahoo! for the past=
three months is now blocking entire /24's if a few IP's get complaints. Th=
ey have the feedback loops however when you have a network with 175,000 IP =
addresses and you sign up for a feedback loop for them all they tend to flo=
od your abuse desk with false positives, or forwarded spam. They also don't=
keep track of which IP's are getting the complaints for you to investigate=
after the block on the /24 so asking them won't help :(. This potentially =
means one customer could easily effect the other customer. They offer white=
listing, but this won't get you passed their blocks on the entire /24. They=
apparently will eventually accept the message because they aren't necessar=
ily 'blocked' but they are 'depriortized' meaning they don't believe your I=
P is important enough to deliver the message at that time, so they want you=
to keep trying and when their servers are not 'busy' or 'over loaded' they=
will accept the message. (Paraphrased from conversations with their 'Bulk =
Mail Advocacies and Anti-Abuse manager.)
-Ray
-----Original Message-----
From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Chr=
is Stone
Sent: Thursday, April 10, 2008 1:49 PM
To: nanog@merit.edu
Subject: Re: Problems sending mail to yahoo?
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Barry Shein wrote:
> Is it just us or are there general problems with sending email to
> yahoo in the past few weeks? Our queues to them are backed up though
> they drain slowly.
>
> They frequently return:
>
> 421 4.7.0 [TS01] Messages from MAILSERVERIP temporarily deferred d=
ue to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01=
.html
>
> (where MAILSERVERIP is one of our mail server ip addresses)
....
> Just wondering if this was a widespread problem or are we just so
> blessed, and any insights into what's going on over there.
I see this a lot also and what I see causing it is accounts on my servers
that don't opt for spam filtering and they have their accounts here set to
forward mail to their yahoo.com accounts - spam and everything then gets
sent there - they complain to yahoo.com about the spam and bingo - email
delays from here to yahoo.com accounts....
Chris
- --------------------------------------------------------------------
Chris Stone, MCSE
Vice President, CTO
AxisInternet, Inc.
910 16th St., Suite 1110, Denver, CO 80202
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PH 303.592.AXIS x302 - 866.317.AXIS | FAX 303.893.AXIS
- --------------------------------------------------------------------
cstone@axint.net | www.axint.net
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