Computer networks notes

DNS Records & Email Security

The record types you will actually configure, and how they stop email spoofing. Every section is a drawn page beside a clear written explanation, about 10 minutes in all.

  • Chapter 21 of 31
  • About 10 minutes
  • 8 sections
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The first drawn page of DNS Records & Email Security: What is a DNS record?
The chapter's first page: What is a DNS record?

In this chapter

  • What is a DNS record?
  • The records you need to know
  • A and AAAA
  • CNAME (alias)
  • MX (mail routing)
  • SPF, who may send
  • DKIM, a signature
  • DMARC, the policy

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