I have an Exchange 2003 server running on SBS 2003 that will not deliver mail from one specific domain. the mail headers from the blocked domain show absolutely nothing unusual when received on another mail service. Here's the twist: the server is also running Blackberry Enterprise Server, and email from the domain DOES get delivered to user's handhelds.
the installation is totally stock, all patches applied- I've tried archiving the undelivered mail, cranking the IMF way down, and nothing. the mail from this one specific domain just vanishes w/o a trace, yet I know it''s hitting the server, since it goes to the handheld. any ideas?