According to [http://www.carleton.ca/~dmcfet/html/ssi.html#email|this documentation' from Carlton University, Server Side Includes have a tag to generate email. Since I haven't seen it mentioned elsewhere, this may be one of the ones only provided by Webstar web servers.

But if it's provided on your system, you don't have to do a thing, just provide the tag and leave all the work to the server.