I'm trying to get my hands on this issue. My log file is filling up with :

550 5.1.2 <MYEMAIL@MYOTHERDOMAIN.COM.www.MYDOMAIN.com>... Host unknown (Name server: MYOTHERDOMAIN.COM.www.MYDOMAIN: host not found)

I think this is wrong, and I've missed some mails, but can't find them in this log file or anywhere else for that matter. I'm supposed to recieve a bunch through php activating sendmail.

Not having fun trying to learn sendmail!

Let me know if we need more information to tackle this.

Obviously it's appending my domain name to the outbound destination?

thanks for any help or suggestions