scripting the mail

so i just installed jaguar, i know i am a little slow. i am in the process of converting some of my scripts from os9 into osX and have run into a small problem. i had a small applescript that when launched via a rule set up in outlook express would gather the information and e-mail me back at the sending e-mail address. i have converted most of my script, all of the information gathering and formating it into a new message but how do i get mail to send it back to the reply to e-mail address?

any help would be much appreciated.

P.S.:what other scripting additions should i get ino my osX box?

thanks