Exchange 2007 unable to relay for additional domain (550 5.7.1 Unable to relay)
Posted on 2009-04-01
We currently have a single 2007 exchange server that is setup to receive from multiple domains.
All of these are Authoritative and work fine. We've since added another domain d.com yet we can't recieve email to it and get a 550 5.7.1 Unable to relay NDR.
The Hub transport connectors are default (Client/Default) and anonymous is checked for both. It's all fairly standard and is setup with SMTP * as default.
Can't see where this is going wrong unfortunately, the troubleshooting assistant returns with Mail submission failed: Error message: The SMTP host was not specified..