Microsoft CDO (Collaborative Data Objects) supports sending messages using both the SMTP and NNTP protocols.

Most obviously you have this library installed on your computer. You can check folder C:\Program Files\Common Files\Microsoft Shared\CDO. There should be file named CDOEX.DLL or with a similar name, depending on version of your OS.

Also it requires Outlook Express or any other email client installed with a default email account properly configured in its SMTP part: SMTP server, user, password. Such default email client provides CDO object with connection data it needs for accessing an SMTP server.

Check MSDN article Collaborative Data Objects (CDO) Frequently Asked Questions
http://support.microsoft.com/default.aspx?scid=/support/messagingsdk/faq/cdofaq.asp

CDOEmail page on FoxPro Wiki site
http://fox.wikis.com/wc.dll?Wiki~CdoEmail~VFP