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Security monitor

Monitor the domain controls your business relies on.

Quick answer

Domain monitoring helps you notice changes to DNS, certificate, and email-authentication settings. It is an early-warning layer, not a full domain or email security audit.

Who this is for: Businesses that own a public domain and use it for websites or email.

What to do

  1. 01Confirm the domain and provider accounts are owned by the business.
  2. 02Record the expected DNS, SPF, DKIM, and DMARC configuration.
  3. 03Review meaningful changes and investigate unexpected edits.
  4. 04Protect registrar and DNS accounts with MFA and separate administrator access.

What this does not cover

Passive checks cannot prove who changed a record, inspect private provider activity, or determine legal impact.

Authoritative source

CISA Email and Domain Security Guidance

Last reviewed: September 16, 2026

This page is educational information, not legal advice or a professional security audit. Check the official requirements and get qualified help when your circumstances require it.

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