Internet electronic mail (email) allows a person to compose a
message and to send it to another person, usually
on a remote system. Most email software also provides software to
facilitate reading, saving, printing and replying to email. Until
very recently, electronic mail was the single
biggest generator of traffic volume on the Internet.
Email messages are delivered as follows:
Key concepts:
RFC821 (and subsequent, currently RFC2821) SMTP protocol
RFC822 (and subsequent, currently RFC2822) message format
