Definition of Email

Definition of Email: (computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that can be regenerated at the recipient's terminal when the recipient logs in
you cannot send packages by electronic mail

Email on wiseGEEK:

• The difference between this scheme and push email is that, with push email, the email is sent to the client without waiting for polling. Pushemail can be somewhat simulated by setting an email client to frequently poll for new mail.
  
• Depending on how one defines email, the earlier providers could go back as far as 1965. In the early days of computing, something akin to modern email developed naturally. Different users who worked on the same workstation usually had their own individual directories, to store their various working files.