![]() ![]() ITEC4621 Network Security Mail Servers mailbox contains incoming messages for user messagequeue of outgoing (to be sent) mail messages SMTP protocol Deliver emails from user agent to user’s mail server Deliver emails between mail servers user agent user agent user agent user agent user agent user agent SMTP SMTP SMTP mail server mail server mail server Electronic Mail (cont.) ITEC4621 Network Security Three major components: user agents (UAs) mail servers simple mail transfer protocol: SMTP Mail Transfer Agents (MTAs) User Agent Known as “mail reader” composing, editing, reading mail messages e.g., Eudora, MS Outlook, Outlook Express, Netscape Messenger outgoing, incoming messages stored on server user agent user agent user agent user agent user agent user agent SMTP SMTP SMTP mail server mail server mail server outgoing message queue user mailbox Overview of Electronic Mail ![]() ITEC4621 Network Security Lecture 07 PGP and S/MIME Supakorn Kungpisdan, Ph.D. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2022
Categories |