Attila Kinali writes:
On Wed, 20 Feb 2008 05:15:58 -0600 "Rick Harris" <rick@learntime.com> wrote:
whateveraddress@yahoo.com R=lookuphost T=remote_smtp defer (0): SMTP error from remote mail server after initial connection: host g.mx.mail.yahoo.com [206.190.53.191]: 421 4.7.0 [TS02] Messages from 216.104.33.122 temporarily deferred due to user complaints - 4.16.56.1; see http://postmaster.yahoo.com/421-ts02.html
Same here, although i get a TS01 instead of a TS02. And 10'000 a day of those.
This is just selective greylisting, which lots of sites use as a blanket policy.
A look at
http://help.yahoo.com/l/us/yahoo/mail/postmaster/postmaster-15.htmlsuggests that Yahoo doesn't have a clue about discussion lists. They seem to think that all mailing lists are announcement lists (of course that's apparently the OP's case). Consider this list:
Other great resources:
* Help For Marketers by Scott Hazen Mueller
* Marketing on the Internet Without Getting Burned by John C. Mozena
* ESPC's best practices
* How to Advertise Responsibly Using E-Mail and Newsgroups (RFC 3098)
* MAAWG Sender BCP Version 1.1:-(
If you're in a hosted environment, you might think about asking your host to implement domain keys and/or PGP-signing your mail. (Mailman is (was?) not friendly to domain keys of non-owner posters, but in the case of an announcement list having the host sign the post should work fine.)