You actually have a few issues here. The first one is that your PATH variable is tainted. This is to prevent a clever cracker from figuring out how to set the path and have your code execute his or her "sendmail" program.

Further, though I haven't tested it, I'm pretty durned sure that $email will be tainted. If it's not, it should be. Remember, taint checking is to ensure that no data derived from outside your program can affect anything outside of your program. Because you didn't explitly set $email in your program, you have no guarantee of it's value, and therefore it's effect on the overall program. Once again, a clever cracker finding a way to alter the contents of your database could make your life miserable.

Cheers,
Ovid

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