December 2010
Intermediate to advanced
365 pages
12h 18m
English
book
Foundations of Python Network Programming: The comprehensive guide to building network applications with Python, Second Edition
by Brandon Rhodes, John Goerzen
Content preview from Foundations of Python Network Programming: The comprehensive guide to building network applications with Python, Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 13. SMTP
As we outlined at the beginning of the previous chapter, the actual movement of e-mail between systems is accomplished through SMTP: the "Simple Mail Transport Protocol." It was first defined in 1982 in RFC 821; the most recent RFC defining it is 5321. It typically serves in two roles:
When a user types an e-mail message on a laptop or desktop machine, the e-mail client uses SMTP to submit the e-mail to a real server that can send it along to its destination.
E-mail servers themselves use SMTP to deliver messages, sending them across the Internet to the server in charge of the recipient e-mail address's domain (the part of the e-mail address after the
@sign).
There are several differences between how SMTP is used for submission ...
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