Exchange 2003 mail to Exchange 2007

I introduced an Exchange 2007 server into our site. Everything works well. I
moved one mailbox over to the Exchange server. Everything looked good. I can
send mail from the exchange 2007 mailbox to the exchange 2003 mailboxes. But
the Exchange 2003 mailboxes can not send mail back. I do have a RGC between
the server and it is bidirectional. I have deleted it and recreated it. Both
servers have a SMTP connector to the Internet. The Exchange 2007 server is
hosting the hub role. We do not have an edge server. Do I need to do
something from the Exchange 2003 server to allow it to send mail to the
exchange 2007 mailboxes?

Craig


.

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