Fixes: #3836

Author: Florian Schaal

interface/web/dns/dns_wizard.php

@@ -267,7 +267,7 @@
 	elseif(isset($_POST['ns2']) && !preg_match('/^[\w\.\-]{2,64}\.[a-zA-Z0-9]{2,30}$/', $_POST['ns2'])) $error .= $app->lng('error_ns2_regex').'<br />';
 
 	if(isset($_POST['email']) && $_POST['email'] == '') $error .= $app->lng('error_email_empty').'<br />';
-	elseif(isset($_POST['email']) && !preg_match('/^\w+[\w.-]*\w+@\w+[\w.-]*\w+\.[a-z0-9\-]{2,30}$/i', $_POST['email'])) $error .= $app->lng('error_email_regex').'<br />';
+	elseif(isset($_POST['email']) && filter_var($_POST['email'], FILTER_VALIDATE_EMAIL === false)) $error .= $app->lng('error_email_regex').'<br />';
 
 	// make sure that the record belongs to the client group and not the admin group when admin inserts it
 	if($_SESSION["s"]["user"]["typ"] == 'admin' && isset($_POST['client_group_id'])) {