I have an existing Exchange 2003 server with about 35 mailboxes and about 120GB of Public folders. We have introduced a new Exchange 2007 server. Mail flows from the 2007 server to users on the 2003 server, but not the other way. I have deleted and re-created the Routing Group Connectors as bi-directional.
The only error message I can find is in the Queue viewer in ESM on the 2003 box - "The remote server did not respond to a connection attempt." I have been able to connect and send a message from the 2003 server using telnet and port 25 on the 2007 server, but the queue on the RGC is slowing filling up.
Thanks in advance for your help!