[Mailman-Users] Bounce issues with Yahoo

Greg Lindahl lindahl at pbm.com
Thu Mar 2 01:42:24 CET 2006

On Wed, Mar 01, 2006 at 05:43:07PM -0500, Jonathan Dill wrote:

> Are you getting explicit REJECT messages from Yahoo! or some other error?

I'm getting 4XX frequently, and occasionally:

7E7E824F81      634 Wed Mar  1 09:03:21  bar at baz.com
(host mx3.mail.yahoo.com[] said: 451 VS5-MF Excessive unknown recipients - possible Open Relay http://help.yahoo.com/help/us/mail/spam/spam-18.html (#4.4.5) (in reply to MAIL FROM command))
                                         foo at yahoo.com

What I think this means is that they're noticing that I originate too
much email to Yahoo users that don't exist. It comes and goes, which is
what you would expect for a real-time check.

(FYI, I'm not an open relay, and I'm not in the RBL's you suggested I

-- greg

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