OPS535 Email Protocols

Basic Concepts and protocols

• How Email Works
  • Simple Diagram 1
  • Simple Diagram 2
  • Email Components
• SMTP Slides
• POP3 and IMAP Slides
• Sequence Diagram for the steps involved in sending an e-mail (pdf)

Sender Policy Framework

To protect other people spoofing your domain for email.

• Postfix and SPF

References

• Email on Wikipedia