XFOR: Exchange PC MTA Will Not Connect to Indirect Downstream PO

MORE INFORMATION

Exchange needs to know the connection path to any Microsoft Mail postoffices in order to be able to deliver mail to them. Once you defined a connection to any one postoffice, a direct routing path is defined for the connector.

For example:

   Connector PO (A) ---- Hub PO (B) ---- Downstream PO (C)
				

An instance of the Microsoft Mail Connector (PC) MTA can be configured to move mail between A and B, but not between A, B, and C if you want to go indirect via B.

You can create an instance of PC MTA to move mail between A, B, and C, but mail from A to C and C to A will go direct. This is because the PC MTA needs to have connection information to be able to connect to any PO. Since it is possible to have a direct connection, then there is no need for an indirect route to this PO.