DMARC BASICS

Understand DMARC without the jargon

DMARC is simply a short instruction you publish in DNS. It tells receiving mail servers how to treat messages that pretend to be you and how to send you summary reports when something looks off.

It does not reroute, delay, or expose your emails. When DMARCFlow sets it up, mail keeps flowing as usual while you gain full visibility into spoofing attempts.

  • 1Lives in DNS – no inbox access required.
  • 2Reports are machine-readable summaries, not message content.
  • 3Works alongside SPF & DKIM you already use.
Book a DMARC setup call Run a free DMARC check
Illustration of DMARC insights

How it works

What DMARC does day to day

Think of DMARC as a policy note shared with the entire email ecosystem. It links your existing SPF and DKIM checks and spells out how to handle suspicious traffic.

1

A short DNS instruction

You add one TXT entry under _dmarc.yourdomain.com. It lists a policy (monitor, quarantine, or reject) and where reports should go. No servers are moved.

2

Receivers compare SPF & DKIM

When Gmail, Microsoft, or another provider receives your mail, they verify whether the SPF sender and DKIM signature align with your domain.

3

You get daily reports

Their systems send aggregated XML reports. Each line is a count of attempts per source IP – never the body of any message.

What actually changes when DMARCFlow helps

We review your existing DNS, stage DMARC in monitor mode, and then tighten the policy only when we know every legitimate sender passes.

  • ✔ No MX or mailbox access required.
  • ✔ We only touch DNS records you approve.
  • ✔ You can revert with a single change if needed.

Before DMARCFlow

Mail is delivered, but spoofing attempts go unnoticed. You have no reporting or enforcement.

During onboarding

We publish DMARC with p=none (monitoring). You receive reports, and we clean up SPF/DKIM gaps without touching your content.

After enforcement

Once everything authenticates, we move to quarantine/reject. Legitimate traffic keeps flowing, while spoofed messages finally fail.

DMARCFlow privacy protected dashboard

Privacy promises

DMARCFlow never sees email content

The only data we receive are aggregated XML lines such as “250 messages from 203.0.113.10 passed”. There is no subject line, attachment, or body inside.

Think of it as delivery receipts – enough to prove authenticity, never enough to read a single message.

Aggregated only

DMARC reports group messages by source. They cannot be traced back to individual employees or customers.

Transport stays the same

No mail is rerouted through DMARCFlow. Every message still goes directly from your server to the recipient.

Reversible setup

If you ever want to pause enforcement, changing the policy value in DNS is enough.

Compliance ready

We document every change for auditors so you can show exactly who touched which record.

Next step

Ready for safe DMARC enforcement?

We roll out the policy, monitor the reports, and show you proof that nothing about your email traffic becomes readable or risky.

Talk to an expert Browse pricing