Open up the page:
webassist/form_validations/wavt_scripts_php.php
and delete lines 369-371
Then open up the page:
webassist/email/mailformatting.php
and delete lines 218-220
They should be the exact same code in both places you are deleting:
if (strlen($domArr[count($domArr)-1]) !=2 && !preg_match($knownDomsPat,$domArr[count($domArr)-1])) {
$isValidEmail = false;
}