check reserved addresses

zimbraAddressAvailable.php

@@ -74,6 +74,7 @@ while ($i < count($customfieldsvaluesObj)) {
 		$mailname = $customfieldsvaluesObj[$i]->value;
 		$i++;
 		$maildomain = $customfieldsvaluesObj[$i]->value;
+		$i++;
 		$reservedAddress = $mailname . '@' . $maildomain;
 		array_push($customfieldsvalues, $reservedAddress);
 }