Learn how to send an email with CDOSYS, a CDONTs alternative for sending emails with Win2k and WinXP. If you currently use CDONTS for sending email, the time may have come to bury the dead and move on. Microsoft introduced CDONTS with IIS4, allowing programmers to easily send email from ASP without purchasing and installing 3rd-party components. But, like any evolving technology, a new version has taken center stage. CDOSYS is Microsoft's new and improved interface for SMTP email which was introduced in Windows 2000.