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SEC-C0900 · Migrations & Analyzers

How to Read DMARC Aggregate Reports

Read a DMARC aggregate report you already have. The analyzer does not fetch a mailbox. Do not jump to p=reject from one report.

Updated 25 October 2026 · Checklist

This is an original planning guide. It is not a vendor manual, an official standard, or legal advice. Example addresses use documentation ranges. Review every command before you paste it.

What this hour is for

Paste an XML fragment you may hold. A sample source such as 203.0.113.10 is documentation. The page counts rows. It does not log into a mailbox.

One report is a reason to look at alignment. It is not a reason to publish reject during the reading.

192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. A sample password is replaced. It is not a password you keep.

The change you can finish

Apply nothing while you are writing the note. When the lab window opens, it is one change on the system named in the ticket. Read the draft, then the system, then decide.

Rollback is the file, the record, or the snapshot you saved first. You do not invent a rollback after the only copy is gone.

  1. Paste a report you may hold.
  2. Read the sources.
  3. Write the one sender you did not expect.
  4. Do not change DNS.
  5. Stop.

Mistakes that outlive the statement

How to Read DMARC Aggregate Reports goes wrong in a small set of ways. The list is here so the ticket can forbid them before the window.

Decisions to write down

One decision for How to Read DMARC Aggregate Reports: The report is one you hold. DNS was not changed. And the unexpected sender is written.

Checks before you call it done

Confirm this before you call the change done: The report was read. The unexpected sender is written. DNS was not changed. No mailbox was fetched. And the domain is yours. If one of those fails, stop.

# DMARC aggregate paste. This page does not fetch a mailbox.
# Do not publish p=reject during the reading.
# 192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. A sample password is replaced. It is not a password you keep.

Before you leave the system

How to Read DMARC Aggregate Reports ends when the system in the note is the system in the ticket. If it is not, stop.

The draft stays a draft until a person has read the names in it. A generator does not log in, does not scan, and does not send mail.

192.0.2.10/24, gateway 192.0.2.1, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. They belong in the note. They are not values you publish because a draft included them.

prompt-for-this is a reminder that a secret is missing. It is not a password, a key, or a token you save. A sample password is replaced. It is not a password you keep.

One change is the window. If two things move and the result is wrong, you will not know which one did it.

If the same step fails twice, stop for the day. Restore the copy you took first.

A second person reads the scope aloud. If they cannot find it in the ticket, the note is not done.

This page is a planning guide. It is not legal advice, not an audit opinion, not a vendor manual, and not the text of a standard. You do not disable a security control to make a check pass. You do not use the page against a system you do not administer.

Tools for this guide

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