CHAPTER 12 E-mail Composition and Decoding
Brandon Rhodes, John Goerzen · Apress eBooks · 2010
The early e-mail protocols were among the first network dialects developed for the Internet. The world was a simple one in those days: everyone with access to the Internet reached it through a command-line account on an Internet-connected machine. There, at the command line, they would type out e-mails to their friends, and then they could check their in-boxes when new mail arrived. The entire task of an email protocol was to transmit messages from one big Internet server to another, whenever someone sent mail to a friend whose shell account happened to be on a different machine. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.