Like creatures running through a maze with constantly shifting walls, spammers dart and weave to sneak their solicitations past ever wilier junk mail filters.

Some mail filters are able to edit messages during processing.

Common uses for mail filters include organising incoming email and removal of spam and computer viruses.

Users might also employ a mail filter to prioritize messages, and to sort them into folders based on subject matter or other criteria.

Bogofilter is a mail filter that classifies e-mail as spam or ham (non-spam) by a statistical analysis of the message's header and content (body).

"Good junk mail filter!"

Reporting messages as spam or junk helps to train the mail filter so that the messages aren't delivered to your inbox.

This makes detection of such emails harder for mail filters and users.

Stuck in the lint trap of my mail filter is a recent solicitation from "Evelyn Gordon" offering low mortgage rates.

Administrators - the grandchildren, most likely - can create and send monthly photo calendars and manage the online mail filter.