... importantenough to the sender to warrant the investment.Electronic mail, however, shifts that burden.With the volume of electronic mail sent eachday, the onus is on the recipient — not the sender — to ... became ubiquitous, to send aletter, a person had to commit the information to paper, stuff and address the envelope, affixpostage, and drop it in the mailbox. Days orweeks later, the message ... how to controltheir email instead of letting it run theirworkday.On one hand, email enables anyone with anInternet-connected device to send informationgreat distances at the press of a button....