@Peter: no domain2.com is not listed as inbound in the routing tab, it is listed in the address space tab to be routed to the according server and it is in the connected sites tab. @Daniel: the routing restrictions indeed work both on the main server b/c non-mapi clients can send mail through with authentication and the two other boxes for sub[1-2].domain.com work also proper. Any more ideas? Steffen
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