Yes, we are in exactly the same situation. Our mailserver receives a lot of mail for various domains, and forwards to various users with xtra addresses. We are getting the exact same error – deferred etc
What I'm seeing is rather interesting, all my mail forwarded to xtra get accepted by mx1.tnz.mail.yahoo.com. Around 75% of the mail forwarded to mx2.tnz.mail.yahoo.com gets the "Deferred: 451 VS2-MF Excessive unknown recipients" -- ------------------------------------------------------------------------ Jean-Francois Pirus <jfp(a)clearfield.com> Senior Software Engineer Phone (+64-9) 358 2081 Clearfield Software Ltd Fax (+64-9) 358 2083 4th Floor 8-10 Whitaker Place Mob (+64-21) 640 779 P O Box 3901 Auckland, New Zealand ------------------------------------------------------------------------