Note that the username field will be what the form uses as the "From" address when mailing the form results to you.
The form action for the fmail.pl script is: "/cgi-bin/fmail.pl"
Method is: post

There are 3 hidden fields that the fmail.pl script needs: recipient, subject, and thankurl The syntax is below:

<input type="hidden" name="recipient" value="yourname@yourdomain.com">
<input type="hidden" name="subject" value="Order Form">
<input type="hidden" name="thankurl" value="http://yourdomain.com/thankyou.html">

If you'd like the form to email the results to more than one email address, the syntax would be:
<input type="hidden" name="recipient" value="you@yourdomain.com,fred@aol.com">

If the form page is a secure page, make sure to also have a secure URL as the "thankurl". Otherwise you will get a security error.