it's been ages since i last used formmail scripts, but i remember something like the fields being saved in a hash called %Form, so if you want to print them you could maybe use foreach $field(sort keys %Form) {print $field.": ".$Form{$field}."<br  />"}
but your script might be different from the ones i used, since there are so many out there. why don't you post the entire code so we can take a look at it?!
=)