check reserved addresses

zimbraAddressAvailable.php

@@ -60,7 +60,7 @@ $customfieldIDsObj = Capsule::table('tblcustomfields')
 	->get()
 	->toArray();
 foreach ($customfieldIDsObj as $customfieldID) {
-	array_push($customfieldIDs, $customfieldID);
+	array_push($customfieldIDs, $customfieldID->id);
 }
 logModuleCall(
 	'zimbrasingle',