Problem sending email

[KatieJ]

I have Vista and installed Outlook 2007. I can receive emails ok, but when I
send a new email or reply to one, I get the following msg.
-sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)

What don't I have set up properly?

 

[Brian Tillman [MVP - Outlook]]

I have Vista and installed Outlook 2007. I can receive emails ok, but when I
send a new email or reply to one, I get the following msg.
-sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)

What don't I have set up properly?

That indiscated you're not properly authenticating to the outgoing server.
Check the box "My outgoing server requires authentication" in the Outgoing
Server tab of your account settings.