Exchange 2010 transport rules

Just a quick overview:

Exchange 2003 SP2 BE Cluster (2node active/passive), OWA FE box, 2003 bridgehead which routes mail off to Mimecast for filtering.

Just implemented Exchange 2010 SP1 RU3 to co-exist with the 2003 environment:

2x CAS/HUB servers on 2 VMware VMs configured as a CAS array
3x Mailbox servers on 3 physical servers configured as a DAG

Just test accounts on the 2010 environment at the moment.

at the moment i haven't configured the Send connectors with any hubs as the source im assuming the mail is routing via the routing groups that link the 2003 <> 2010 together.

One thing im finding is that transport rules don't work, would this be because i haven't configured anything as a source server under the send connectors?

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serchlopConnect With a Mentor Commented:
Yes, I guess that the email is send by the send connector in the exchange 2003 server and that's why transport rules are not applied, because the transport rules are set in exchange 2010 and not for exchange 2003. You have to create a new send connector to internet or to use the other server as a relay for your exchange 2010 server and with this, the transport rules have to be applied.
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