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Understanding Email System Concept (Doc ID 560033.1)

Last updated on APRIL 21, 2020

Applies to:

Linux OS - Version Enterprise Linux 3.0 and later
Oracle Cloud Infrastructure - Version N/A and later
Linux x86-64
Linux x86
Linux x86-64

Purpose

E-mail has become an extremely popular communication tool.A solid understanding of email system concept helps system administrators to investigate various kinds of issues with email system.

Scope

This bulletin is to explain the concept about
1. How does an Email travel
2. Standard format of Email
3. Protocol about  SMTP,POP3 and IMAP

Details

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In this Document
Purpose
Scope
Details
 1. How does an email travel
 2. Message
 3. SMTP - Simple Mail Transfer Protocol
 4. POP3 – Post Office Protocol version 3
 5. IMAP – Internet Message Access Protocol

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