The FormMail Clone is a clone of the popular Matt's FormMail Script. If you are familiar with it, you should not have any problems with the FormMail Clone. This version was created by CPanel developers and does not use any of Matt's code, but it works in the same way.
Note: Due to the number of exploits that have become known with Matt's FormMail script we cannot allow this or any other FormMail script on the server. If you need to use a FormMail script, you can change the ACTION parameter in your FORM tag to use /cgi-sys/formmail.pl. This helps to insure that no spammers are using insecure formmail scripts on the server.
For a complete howto, on how to setup FormMail on your site, read the FormMail Howto.