Hello,
I am helping a customer migrate to a hosted email platform from Exchange 2007 SP3. There is a pilot going on where people's Exchange accounts are configured to forward messages to a contact object that has a temporary SMTP domain that the provider has configured. Messages are also being delivered to their Exchange mailbox as well. "Deliver message to both forwarding address and mailbox" is checked. For people in one AD domain this is working fine with no errors. For people in another, there are getting an NDR, but the mail is being delivered correctly to both locations. This only happens when they receive mail externally. Each domain has its own Exchange Transport and Mailbox servers. Below is the NDR.
Delivery has failed to these recipients or distribution lists:
ContactObject@someexternaldomain.com
Your message wasn't delivered because of security policies. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator.
The following organization rejected your message: HubTransport01.internalAD.local.
Diagnostic information for administrators:
Generating server: HubTransport02.internalAD.local
ContactObject@someexternaldomain.com
HubTransport01.internalAD.local #550 5.7.1 Client does not have permissions to send as this sender ##rfc822;employee@mydomain.com
Dan
