500 Unauthorized relay msg rejected.

D

Dale

Why do I get email bounced back with this error message?

It doesn't happen all the time, but is increasing in
frequency. Could it have anything to do with McAfee
firewall?
 
B

Brian Tillman

Dale said:
Why do I get email bounced back with this error message?

It doesn't happen all the time, but is increasing in
frequency. Could it have anything to do with McAfee
firewall?
Click to expand...

It's often because the sender isn't properly authenticating to the outbound
server.
 
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