Problem with routing internal mail from Exchange 2003 to Exchange 2010 in transition/co-existance
I have a problem with routing mail from mailboxes that reside on my old Exchange 2003 server to mailboxes on a my new Exchange 2010 server.
Also external mail is not routed through my SMTP server on Exchange 2003 to a mailbox on my Exchange 2010 server.
I can however drop mail from telnet session on from sides.
Both servers have routing groups but still no internal mail from Exchange 2003 to Exchange 2010.