IST 233 Lecture Notes - Lecture 3: Message Transfer Agent, Simple Mail Transfer Protocol, Business Logic

• School: Syracuse University
• Department: Information Studies
• Course: IST 233
• Professor: David Molta

Document Summary

Client application interface: 2. business logic (functionality, 3. Clients use smtp to send outgoing mail to mail server: 2. Sender and receiver mail servers exchange messages using smtp: sender"s mail server is acting as an smtp mail relay agent. E-mail access standards: pop and imap: pop (post office protocol) or imap (internet message access protocol) deliver incoming mail to clients. E-mail standards: messages & encoding: rfc 822/2822 defines plain text messages, html used for richly formatted messages, unicode used to represent text in any language, mime used for messages with attachments. The simple part of smtp: smtp servers use a step-by-step, request/response protocol, session setup, 1. the sender sets up a tcp connection to a well-known smtp port (25 or. 465): 2. the receiver accepts connection request and a tcp virtual circuit is established, 3. the sender identifies itself, and the receiver responds, indicating willingness to proceed (or not).