check reserved addresses

zimbraAddressAvailable.php

@@ -35,7 +35,7 @@ if(!filter_var($accountName, FILTER_VALIDATE_EMAIL)) {
 // check reserved mail addresses 
 $zmAuthPIDs = Capsule::table('tblproducts')
 	->select('id')
-	->where('gid', 'IN', '(1 ,3 ,8)')
+	->where('gid', '=', '1')
 	->get();
 logModuleCall(
 	'zimbrasingle',