One useful search query is "A Free Product of
Matt's Script Archive, Inc.". Also if you look at the bottom left of this form.
A lot of forms state:
FormMail V1.6 © 1995 -1997 Matt Wright
A Free Product of Matt's Script Archive, Inc.
I searched on google for formmail.pl, and then I would have to have
it go to the script, and when you bring it up by itself it will say Version 1.6, which is
the GOOD ONE. Another idea is to distribute 1.6 formmail scripts or make it
available for download.