I have followed the online Exchange 2013 jump start to configure my Exchange server. Due to electrical power problems in our country (South Africa) we decided to install a dedicated server with MS Exchange 2013 in a data center that guaranteed up-time.
The server now accepts mails for our domain. We can mail other recipients in our domain without a problem. When we try to mail an external recipient we get a no relay allowed error.
I have registered an authoritative Accepted domain as instructed.
If one uses the OWA to send mails it works fine as well.
How do I allow for relaying of mail from "internal" addresses only.
Thanks