A customer has an Exchange 2007 server, and is having a problem with 2 customers sending them email (not all senders have this issue).
The senders get the following error.
The following recipient(s) cannot be reached:
'FirstName LastName' on DATE TIME PM
554 5.4.6 aliasing/forwarding loop broken (11 aliases deep; 10 max)
Not having much experience with Exchange 2007 yet, I'm a bit puzzled with this one.