I have setup a new Exchange 2003 server in our 2000 Domain.  I have moved a
couple of mailboxes to test prior to taking the old server offline.  Now

1.  First issue- Could not send outgoing from new server with Error 554
5.1.0 NDR.  Could send internally between both servers fine.  Added new
server as member bridgehead and email out works fine. 

2.  Now my old server can send mail to mailboxes on the new server but the
new server cannot send mail to the old server.  both can send and receive
outgoing.

0X8004010F
exmerge errors
Exhange Ate Email Messages
Information Store service shuts down continuously
Public Folder Permissions