PE R905 - Sending SMTP alerts

Hello,

I am trying to send smtp alerts from an R905.

The smtp server is receiving the test alerts, but does not forward them to my email address. It complains "Message to Me@myaddress.com bounced by destination server. Reason: Unknown address error <root@rac-B45HJ1S.myaddress.com>...Domain of sender address root@rac-B45HJ1S.myaddress.com does not exist"

Any ideas what I need to do (nicely :emotion-10: ) to get around this problem?

Thx,

John Bradshaw