Mailhost configuration problem

[Vittorio 0]

Even though I have configured mailhost correctly, today it returned me with:

Quote

 

Hostname verified: mxmtaout02.va1.mxservers.net

Possible forgery. Supposed receiving system not associated with any of your mailhosts

Will not trust this Received line.

Mailhost configuration problem, identified internal IP as source

Mailhost:
Please correct this situation - register every email address where you receive spam

No source IP address found, cannot proceed.

 

 

I tried re-configuring it to no avail.

 

What should I do?