Email as a medium of communication has become an almost indispensable tool for business, educational, social and personal purposes. Its importance in the future will, in all likelihood, continue to grow at an almost exponential rate, despite the plague of spam that is choking the internet.

Email has the advantage of regular postal mail in that it is delivered into the recipient's mailbox for them to read and reply to at their convenience, but without the lengthy time delay involved with 'snail mail'. Email also has the advantage of being quick and easy. It doesn't oblige the sender to engage in small-talk with the recipient, as telephones do. Using the phone to convey a simple message to a friend might involve a 10-15 minute conversation because no-one wants to appear rude by hanging up too soon. In an increasingly busy world, email allows the same message to be conveyed in a minute or two without implied rudeness.