[G4] Sending messages with Entourage

[Dennis Ray]

I've been using Eurdora for years, but have decided to switch to 
Entourage (part of the Microsoft Office 2001 suite) because of the 
address book integration with the other Office pieces.  But, about have 
the time it won't "send" when I want it to; I get a "relaying denied" 
error message. Other times it goes out as it should.  I'm sending via a 
"mac.com" account.  Does anyone know if this is a Entourage issue or a 
mac.com problem?
                    Dennis