Centralized Mail-Transport In Exchange Multi-Forest Environments

Outbound messages to the Internet are routed from the Exchange Online organization through your on-premises organization. With the exception being messages sent to other recipients in the same Exchange Online organization, all messages sent from recipients in the Exchange Online organization are sent through the on-premises organization. This enables you to apply compliance rules to these messages and any other processes or requirements, like digital sign emails at your smtp gateway, or that must be applied to all of your recipients, regardless of whether they’re located in the Exchange Online organization or the on-premises organization.

Read more at the ENow Software Blog.

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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