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Email filtering is the processing of e-mail to organise it according to specified criterion. Most often this refers to the automatic processing of incoming messages, but the term also applies to the intervention of human intelligence in addition to artificial intelligence, and to outgoing emails as well as those being received.

Email filtering software inputs email and for its output, it might pass the message through unchanged for delivery to the user's mailbox, it might redirect the message for delivery elsewhere, or it might even throw the message away. Some mail filters are able to edit messages during processing.

Motivation

Common uses for mail filters include removal of spam and of computer viruses. Website Hosting. A less common use is to inspect outgoing e-mail at some companies to ensure that employees comply with appropriate laws. Users might also employ a mail filter to prioritize messages, and to sort them into folders based on subject matter or other criteria.

Users

Mail filters can be installed by the user, either as an extension of the operating system, or as part of their e-mail client. Internet service providers can also install mail filters in their mail transfer agents as a service to all of their customers. Corporations often use them to protect their employees and their information technology assets. Credit Card Processing.