Some people seem to install a free activeX control called ASPemail for this, but I thought you could do it equally with the SMTP server built into IIS.
Of course, you need to instantiate a server object called "CDONTS" (or thereabouts) in your ASP code, and learn the methods of this object, which seems to be about equally complex as the filesystem object.
To use CDONTS, you will need to configure IIS's SMTP service to run. Most other mailer components allow you to specify the IP address / port of the mail server you would like to use.
Jay Sudowski // Handy Networks LLC // Co-Founder & CTO AS30475 - Level(3), HE, Telia, XO and Cogent. Noction optimized network. Offering Dedicated Server and Colocation Hosting from our SSAE 16 SOC 2, Type 2 Certified Data Center. Current specials here. Check them out.