"由快递公司传递" can be translated into English as "delivered by a courier company" or "transmitted via a courier service".
Here are some example sentences to illustrate the usage:
1、 The package will be delivered by a courier company.
(包裹将由快递公司传递。)
2、 All important documents should be transmitted via a courier service to ensure safety.
(所有重要文件都应通过快递服务传递,以确保安全。)