Authenticating addresses for sending emails

[Ken]

I installed Office XP for Small Business on my laptop
recently. Now, quite often I am getting an error message
when I try to send an email to someone that says, "You
must first authenticate this email address".

Does anyone know how this is done?

Thanks,

Ken

 

[Tedd Riggs]

I have Office 2003 and I saw this once in my copy, I found it all I had to
do was to add the person to my address book as it was part of the built in
Spam filters.