They do have a feedback loop now:
http://help.yahoo.com/l/us/yahoo/mai...?from_url=3Dh=
ttp://help.yahoo.com/l/us/yahoo/mail/postmaster/

But it takes several days to receive a reply from that form, which is just =
a standard reply that tells you to fill out a form and mail it in (postal m=
ail).

Even then the feedback loop is DomainKeys based instead of IP based, so for=
ISPs you don't know if your customers are sending spam to yahoo.

At least I know that I'm not alone now, thanks for the input. I'll let eve=
ryone know if I make any headway.

-Tony

-----Original Message-----
From: Randy Ramsdell [mailto:rramsdell@livedatagroup.com]
Sent: Monday, February 25, 2008 1:51 PM
Cc: users@spamassassin.apache.org
Subject: Re: [OT] Yahoo Deferred

SM wrote:
> At 08:54 25-02-2008, Tony Bunce wrote:
>> Is anyone else having issues sending mail to Yahoo?
>
> No.
>
>> They are returning 421 Message temporarily deferred to every message
>> my servers try to send. My server then retries like it should but
>> yahoo never accepts the message, even after day of retrying.
>> Google turned up several people having the same issue but no one with
>> a solution. My DSN is right, I have SPF records, and sign outgoing
>> messages using DomainKeys.
>
> They are deferring connections from your mail servers due to spam or
> complaints.
>
> Regards,
> -sm
Incorrect! They rate limit everyone. If you're mail isn't being delayed,
then you do not send much mail to them. This has been an issue as long
as I can remember and nothing works to help. Use DKIM/Domain Keys, rotor
e-mail to different ips, fill out ALL there forms and comply with all
their rules. This will not put you on their whitelist and they do not
have a formal feedback loop. I have formally asked that we warn our
users to no use yahoo email addresses for this reason. As a matter of
fact, I have been able to work with every other large e-mail provider/
ISP (AOL/Comcast/Netzero , etc...) and work out e-mail issues with them.
I even have several contact numbers directly the administrators of these
companies. Yahoo simply sucks in this regard and they have not yet
figured out a way to properly set up restrictions so bulk e-mailers may
send e-mail. If you are going to store the largest numbered e-mail
accounts, then you will receive bulk mail.

Randy Ramsdell