post-free

例句：

1. 1. We ordered a package with post-free delivery service.
   我们订购了一个带有免费快递服务的包裹。
2. 2. The store offers post-free returns for all purchases within 30 days.
   该商店对所有购买在30天内提供免费退货服务。
3. 3. The new policyallows customers to receive their packages post-free.
   新政策允许顾客免费收到他们的包裹。