Ah, are you on a residential internet service? And what kind of service is your friend running on? This could still be an issue with the IP type. But, there could also be something else going on. Can you post the actual SMTP error you are getting?
He is on Road Runner just like me, and lives next door.... And our IP addresses are very similar, We have the same speed and package.
The error I am seeing in the Log, is SMTP protocol returned a permanent error.
When I send a email from my road runner email account or yahoo, It comes back to me with...
This Message was undeliverable due to the following reason:
Each of the following recipients was rejected by a remote mail server.
The reasons given by the server are included to help you determine why
each recipient was rejected.
Recipient: <
[email protected]>
Reason: Relay rejected for policy reasons.
I do not have a policy created, But my friend does not have it created and his works... But maybe I need one. I do not know how to create one.