Bags of incoming mail were received and sorted on the trolleys as they moved through the city.

Using document scanning and document capture technologies, companies can digitise incoming mail and automate the classification and distribution of mail within the organisation.

Mail slots are limited to receiving incoming mail, as most have no provision for securing and protecting outgoing mail for pickup by the mail carrier.

This query returns a list of host names of mail exchange servers accepting incoming mail for that domain and their preferences.

This too can help in setting up filters for incoming mail.