We are in the preliminary steps of migrating from Exchange 2003 to Exchange 2010.
We have one Exchange 2003 server, one Exchange 2007 server, and one Exchange 2010 server.
The Exchange 2003/2010 need to share a namespace of contoso.com.
When we send from Exchange 2003 to Exchange 2010, the mail flows directly from E2K3 to E2K10.
when we send from Exchange 2010 to Exchange 2003, the mail flows from E2K10 to E2K7 to E2K3.
How can we stop mail from flowing through E2K7 from E2K10?