[SoftDux]

One of our Linux cPanel servers have been blacklisted by Yahoo. I followed their recommended.

I see a lot of these errors in /var/log/exim_mainlog:

2011-02-14 11:23:54 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host e.mx.mail.yahoo.com [67.195.168.230]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See 421 4.7.1 [TS03] All messages from x.x.x.x permanently deferred | Yahoo! Postmaster Help
2011-02-14 11:23:54 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host b.mx.mail.yahoo.com [74.6.136.65]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See 421 4.7.1 [TS03] All messages from x.x.x.x permanently deferred | Yahoo! Postmaster Help
2011-02-14 11:23:54 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host m.mx.mail.yahoo.com [66.94.238.147]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See 421 4.7.1 [TS03] All messages from x.x.x.x permanently deferred | Yahoo! Postmaster Help
2011-02-14 11:23:54 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host h.mx.mail.yahoo.com [66.94.236.34]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
2011-02-14 11:23:54 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host k.mx.mail.yahoo.com [98.139.54.60]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
2011-02-14 11:23:54 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host i.mx.mail.yahoo.com [74.6.140.64]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
2011-02-14 11:23:55 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host j.mx.mail.yahoo.com [66.94.237.64]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
2011-02-14 11:23:55 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host d.mx.mail.yahoo.com [209.191.88.254]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
2011-02-14 11:23:55 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host g.mx.mail.yahoo.com [98.137.54.238]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
2011-02-14 11:23:55 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host l.mx.mail.yahoo.com [74.6.136.244]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
2011-02-14 11:23:55 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host f.mx.mail.yahoo.com [98.137.54.237]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
2011-02-14 11:23:55 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host c.mx.mail.yahoo.com [206.190.54.127]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
2011-02-14 11:23:55 1Pouer-0005le-Fk SMTP error from remote mail server after initial connection: host a.mx.mail.yahoo.com [67.195.168.31]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html
2011-02-14 11:23:55 1Pouer-0005le-Fk == delport_michelle@yahoo.com R=dk_lookuphost T=dk_remote_smtp defer (0): SMTP error from remote mail server after initial connection: host a.mx.mail.yahoo.com [67.195.168.31]: 421 4.7.1 [TS03] All messages from 66.197.167.227 will be permanently deferred; Retrying will NOT succeed. See http://postmaster.yahoo.com/421-ts03.html

So, following the suggestions here: What are some best practices when sending to Yahoo! Mail? | Yahoo! Postmaster Help
I can safely say that, from a hosting side:

1. We don't use DKIM, since cPanel doesn't officially support it, but we have SPF & DomainKeys installed on all domains.
2. PTR records for the server is setup properly.
3. The mail server is secure, and not an open relay

Many of the other options on that list is the responsibility of our clients, and I honestly don't know how to check and see if all clients follow those practices w.r.t. mailing lists (i.e. using opt-in / opt-out, pay attention to email content, etc).

So, does anyone know how we can clear the Yahoo blacklist, and keep a better tab on clients? It's a shared server, so it's a bit tricky to know if / when a client sets up a mailing list, and if they do follow the correct procedures.



Any pointers or help with this would be appreciated.

I have spoked to Yahoo about this a few times but always just get their crappy canned response telling me to follow the recommended guidelines, but then nothing more from them.

[JohnnySaur]

I haven't done it yet or have experienced that situation that you had but I can say that try to follow the steps or e-mail Yahoo so that they will help you how to do it.

[tweakservers]

there are some suggestion that to change your mail server retry time for processing the spool mails. However, if you are contacting Yahoo, you will need to prepare to spend some times with them, they will reply with a full set of template to request you to fill up the information. Some times though say it's being whitelisted we are still those issues around.