What Is Email?
An email message is an electronic letter composed on one computer and transmitted across a network to another computer (which might be nearby or on the other side of the world). Email developed early in the history of networking. Almost as soon as computers were linked into networks, computer engineers began to wonder if humans as well as machines could communicate across those same network links.
The current Internet email system dates back to ARPAnet days. Most of the Internet’s email infrastructure is derived from a pair of documents published in 1982: RFC 821 (“Simple Mail Transfer Protocol”) and RFC 822 (“Standard for the Format of ARPA Internet Text Messages”). Later documents have refined these specifications, including ...
Get Sams Teach Yourself TCP/IP in 24 Hours, Fourth Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
