A post office service which provides an alternative to delivery of mails by a postman is the?

The post office service which provides an alternative to delivery of mails by a postman is the "Post Office Box". A Post Office Box is a locked mailbox located at a post office station. This service enables individuals or businesses to rent a mailbox to receive mail and parcels. It provides a secure and convenient way to receive mail, particularly for those who do not have a permanent mailing address or do not want to disclose their home address. The post office box can be accessed at any time during the post office's business hours.