LESSON 10
Date: 4/9/2009
Email Basics
Linux for Engineering and IT applications
SMTP and DNS
To identify the actual SMTP server for host host2.dom.com, run command
host -t MX host2.dom.com
Basic Steps of Email Transaction
Composing and Sending Email
Email Envelope and Headers
Popular Unix SMTP servers
IMAP and POP servers
Example of POP3 session
Example of IMAP session
SMTP and DNS
Basic Postfix Settings
Open Relay
Relaying e-mail to the outside of NAT
Steps to Protect Email Server on the Internet
Practical Exercises
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