[Mediawiki-l] Yahoo drops confirmation email

[roger at rogerchrisman.com]

When I save a _Yahoo_ email address into my wiki user's "My
preferences" on my MediaWiki 1.16.1 at teflchina.org I never get the
confirmation email in my Yahoo mail box. Same for my wikigogy.org
MediaWiki 1.16.0 on the same server.

Gmail and other email addresses get the confirmation emails from my
wiki fine. Only Yahoo email address don't get the confirmation emails.

I saved the same email address (m2_cn at yahoo dot com) in my user
preferences on Wikiversity.org and got the confirmation email in my
Yahoo mail box fine. But not on my own small MediaWikis.

Yahoo _seems_ to be dropping my wiki's confirmation emails without
even bouncing them back to my server. I see some bounced confirmation
emails in my server in /home/roger/mail/new/<here> from bogus
addresses attempted by spam bots creating users on my wiki. Nothing
from Yahoo though.

My email server identifies itself in emails as cpanel68.gzo.com. That
is the shared server I am on at Dathorn.com where I host my site.

What can I do so that Yahoo will not drop my wiki's confirmation emails?

Anyone else had this problem?

Thanks,
Roger