I don't know what's up with that, but you might try looking into the PHP file where the send mail call is be processed.
The usual way to implement this is to call the PHP mail function as:
mail ($to, $subject, $msg, $mailheaders);
The call might look something like this:
mail ("you@youremail.com",
"subject whatever",
"the message whatever",
"From my web site, Repy to: blah blah");
You can "roll your own" php module to do all of this. Then when the user hits the "Send" button (or whatever it's called) just have the ACTION param on Form 1 call the php script.
If you are desperate to do this, check Meloni's book "PHP Fast & Easy Web Development" Chap 8. She covers this topic pretty well.
