>>>I believe that this error can be fixed by the "authentication" setting. In Outlook this is called "My outgoing server (SMTP) requires authentication." Do you know how I can set this through wwIPStuff?
>>
>>Last time I checked, Wwipstuff doesn't support smtp-auth.
>>
>>I use the latest BLAT.DLL for it; it does support it.
>
>What is BLAT.DLL and what does it do? Where can I find it?

Blat.dll is a dll that sends email. It's free. I did a google search "blat dll" and found this url in 2 seconds: http://www.geocities.com/toby_korn/blat/

it allows you to send email including smtp-auth.