Try using MS Outlook and sending an email thru that. just to check whether the smtp server is ok.
Also, just for troubleshooting, you can set up a smtp server on your own machine, just to see if the program works ok locally. You can download
Postcast for free, and this sets up your pc as the smtp server. So when running the CVI example ( or from outlook), you can specify the server name as you own machine name or just as localhost.
Hope this helps
Bilal
Bilal Durrani
NI