Unable to deliver email from Messaging Gateway to Exchange 2007 or later mail server.
When attempting to deliver email to an Exchange 2007 or later server from a Messaging Gateway (SMG) appliance the email never delivers.
Performing a telnet communication from the appliance to the Exchange 2007 or later server you receive error 530 5.7.1 client was not authenticated.
This is seen after "mail from: [email protected]"
By default, Exchange 2007 and later servers only accepts secure, authenticated connections. The Messaging Gateway appliance is attempting to send email to the server without authenticating resulting in the message being rejected with a terminal 530 response.
Allow anonymous authentication email access to the Exchange server. These instructions were verified for Exchange 2007 and 2010, steps may very in later versions.
Note: The connector name usually starts with "Default", followed by the hostname of your exchange server. If you want to make sure it is the right connector or if there is more than one connector present in your configuration, then follow these steps to verify you are editing the right connector's settings
If secure and authenticated communication is required by IT policy, the SMG appliance may be configured with a TLS client certificate to authenticate itself to the Exchange infrastructure.
For an explanation of the Transport permission's model please see: Exchange 2007 Transport Permission's Model
Information on configuring TLS client certificates can be found in the SMG appliance built-in online help and the Messaging Gateway Administration Guide. Search "Administration Guide".