Handling email has become a greater and greater burden on the average computer user. The user must be able to read mail safely, including
examining the non-obvious fake mail. There is a need to sort valid from
invalid, urgent and non-critical, or just sorting into mail from mailing lists,
friends, relatives, etc.
This problem is worse for the systems administrator who also has to
deal with the quantities of mail clogging the networks, filling the disks and
filling the administrator mailbox with failure notices.