I went to get a copy of FormMail to implement some extensions, and found the following note on
Matt's Script Archive: FormMail
Any users who are using the popular version 1.6 or the recently released version 1.7/1.8, should upgrade immediately. The new version prevents unwanted anonymous spamming through your implementation of FormMail and also prevents unwanted access to environment variables. If you are having problems receving e-mail and using the redirect variable, version 1.9 should cure that as well. The new script has two extra arrays you must now define, but will not affect current forms or the way they appear after having been submitted.
I noted that FormMail v1.6 is in /cgi-sys/.