Limitation of Exchange Hybrid Centralized Mail Transport

I recently had a curious behavior in my customers Exchange 2010 SP3 hybrid environment with centralized mail transport for Exchange 2010 SP3 Edge servers enabled.

Before I describe the topic in more detail I would like to say thank you to the guys from Microsoft: Timothy Heeney, Scott Landry and Tom Kern helped me with my ‘little’ mail flow problem . Appreciate your help.

My customer is using a smtp gateway for external mail flow as usual. Some of the mailboxes have configured smtp forwarding like ForwardingAddress (mail contact) and ForwardingSMTPAddress (external smtp address directly set on the mailbox).

Read more at the atwork.blog