First couple of errors I get are in emailtester.php
this line
S/B
Code:
if($_POST['email_address']){
and this line
Code:
$email = htmlentities($_POST['go']);
S/B
Code:
$email = htmlentities($_POST['email_address']);
After correcting I get this error from checkfirstsub.php
Code:
if (isItAValidEmail($email))
Try isValidEmail()
That's a start for ya