Now before you ask, yes I have browsed the already posted questions and solutions about this topic, but none seem to fit my situation exactly.
We have a Win/Exch 2003 server running which holds most of our mailboxes. Everything works fine.
We have deployed a Win 2008 R2/Exchange 2010 box to use for testing before we migrate the rest of the mailboxes to it.
The move of the test mailbox went fine.
From this mail box, we can send and receive externally, but we can't send internally. Only receive.
We have a send connector configured, and we have removed the original RGC, and recreated it. But still no luck.
You advice appreciated.