Email authentication

Reach DMARC enforcement without breaking real mail

MailTrust gets an organisation's email authentication to a safe, enforced, spoof-resistant state — and keeps it there — across every domain and every tenant you manage. It closes the loop that report-only monitors leave open: it makes the DNS change.

In one line: get every client's domain to enforcement safely, and fix the DNS without leaving the tool.

Why it matters now

Email spoofing and business email compromise remain among the most common and most expensive attack routes, and DMARC enforcement is the proven defence. Yet most organisations sit at monitoring-only, because getting to full rejection without blocking legitimate mail is genuinely frightening: it requires knowing every legitimate sender, fixing SPF and DKIM, and staging the policy.

Meanwhile the decision is being taken out of your hands. Major mailbox providers now require DMARC for bulk senders, brand indicators in the inbox require enforced DMARC, and cyber-insurance questionnaires increasingly ask about it directly.

What it does

  • Email-authentication posture — evaluates SPF, DKIM, DMARC, BIMI and MTA-STS for every domain, continuously rather than at project time. Free tools will draw you a DMARC dashboard; none of them puts that posture next to your Microsoft 365 posture in one audit trail.
  • Real sender inventory — ingests and analyses DMARC aggregate reports to reveal every source sending as your domain: legitimate services and spoofers alike. This is the prerequisite to enforcing safely, and it is the step most projects skip.
  • Staged rollout guidance — concrete steps from monitoring, through quarantine, to full rejection, without blocking mail that should be getting through.
  • DNS written in-product — through the platform's OAuth2 DNS connectors, MailTrust applies the record changes directly for supported providers. Fixing is a click, not a ticket for another team.
  • Drift monitoring — records change and new senders appear. MailTrust keeps watching after you reach enforcement, which is the half a one-off consulting project cannot do.
  • Parked domains, covered properly — the acquisitions, retired brands and defensive registrations nobody sends from. They are the easiest to spoof, because no real mail flows so nothing breaks and nobody notices. They are watched for silent record changes and priced at a fraction of a sending domain, so covering all of them is never the expensive choice.
  • Fleet-ready — every client domain in one console, feeding the shared findings store so email authentication shows up on the board and as control evidence.

The limits, stated plainly

In-product remediation covers the DNS providers we have OAuth2 connectors for today — Azure DNS and DNSimple. Every other provider gets precise, guided manual steps until its connector ships. We would rather name the two than imply all of them.

One operational prerequisite: a mailbox to receive DMARC aggregate reports. That is standard for DMARC analysis generally, and setup is part of onboarding.

Capability and what you get from it

CapabilityWhat it means for you
SPF, DKIM, DMARC, BIMI and MTA-STS postureThe complete email-authentication picture in one place
Aggregate report analysisKnow every sender before you enforce anything
Staged rollout guidanceReach full enforcement without blocking real mail
In-product DNS write-backFix the record without raising a ticket with another team
Fleet viewEvery client domain, one console, one posture score

Objections, answered straight

"We already have a DMARC monitor."

Does it make the DNS change, stage the rollout, and manage every client domain from one console? Most stop at the report and leave the hard half with you.

"Enforcement will block legitimate mail."

That is exactly why the product inventories every real sender from actual reports first, and stages the policy. The safe path is the product.

"Our DNS is somewhere you do not support."

Then you get precise guided steps rather than automation, and we will tell you that before you buy. More connectors are coming.

"Is email authentication really a priority?"

Providers now mandate DMARC for bulk senders and inbox brand indicators require enforcement. It moved from good practice to a requirement.

Find out who is sending as you

The opener is a free email-authentication and spoofing-exposure report on your primary domains — real reports, real senders, a concrete path to enforcement.