Mailtester.ai

Check your DMARC policy

Type a domain. We read its DMARC record, the policy it sets, and whether receivers are being told to act on failures.

Free, instant, no account. We read public DNS — nothing is sent from your domain.

Free check

Is your domain protected — or wide open?

DMARC tells Gmail and Outlook what to do when something fails. Forward an email — we'll tell you in plain English.

Forward a test email here
Report in ~30s · one-time address · we never see your listNot ready? See a sample report first.
Example resultmailtester.ai/report/live
Deliverability62/ 100
Verdict
Risky — don't send yet
Where it lands
Primary 38% · Promotions 41% · Spam 21%
3 quick fixes · first: subject emoji trips Gmail's promo filter+2 more
FAQ

Free DMARC Validator & Policy Checker

What is a DMARC policy?
DMARC tells receiving mailboxes what to do when an email fails SPF or DKIM checks — let it through, send it to spam, or reject it. It also protects your domain from being spoofed.
Is DMARC required to reach the inbox?
Since 2024, Gmail and Yahoo require DMARC for anyone sending in volume. Without it, your campaigns can be throttled or blocked outright.
How do I validate my DMARC record?
Forward an email and we read your DMARC policy from the live message, then explain in plain English whether it's set up correctly and what to change.
Built in the EU · GDPR by default
6,200+ emails tested
AI-classified across real Gmail, Outlook, and Yahoo inboxes.
Free · €0for unlimited scoring. €9.99 for AI deep-dives.
How it works

Three steps. About thirty seconds, end to end.

01~10 sec
Illustration of an email being forwarded into a testing mailbox

You forward it.

Paste the mailbox above into the test-send field in Beehiiv, Kit, Substack, Mailchimp — or your own inbox. Hit go. We never see your subscriber list.

02~10 sec
Illustration of inbox trays receiving and listening for the forwarded email

We actually open it.

In real Gmail, real Outlook, real Yahoo. We watch where your email lands — Primary, Promotions, or Spam — using the same filters that decide whether your campaign worked.

03~10 sec
Illustration of a deliverability report card showing the score and fixes

You get a report.

Plain English. Three things to change, in priority order. Unlock the bundle and we generate a subject, body, and CTA rewrite in your voice — paste them back into your campaign before lunch.

Wait — which one are you looking for?

Two different tests.
Most people mix them up.

If you've ever searched "email tester," half the results check whether the address is valid. We do the other thing — whether the email itself will reach the inbox once you press send.

Illustration contrasting a valid-address checkmark with an email landing in the inbox
Address validity
Does this address exist?

You upload a CSV of subscribers. The tool tells you which addresses bounce. Great for cleaning a stale list before a re-engagement send.

Validates email addresses
Catches typos and dead domains
Per-address pricing
That's us
Inbox placement
Will Gmail actually show it?

You forward one email — newsletter, launch, client note — to a one-time mailbox. We open it in real Gmail, Outlook, and Yahoo and tell you which tab it landed in, plus what to rewrite before you send it to your list.

Inbox vs. Promotions vs. Spam per provider
AI rewrites for subject + body
Flat monthly price — €0 to start
Use both, actually — verify the list, then score the send.Address-validity tools: ZeroBounce, NeverBounce, MXToolbox
Why we built it
We check whether your sends will land. That's the whole product.
Keep going

Other free checks worth two minutes

Pricing

Free to score. Pay only for the AI deep-dive.

Forward any email and get the score — free and unlimited. Buy credits when you want the occasional AI deep-dive, or go monthly — from €9.99 — if you send regularly. Cancel from the same screen you upgrade on.

Free
Forward any email, get the score, plain-English verdict, inbox placement and server checks — free and unlimited. No card needed.
€0
Credits
About 5 AI deep-dives. Top up only when you need them — credits never expire.
€4.99one-time · 499 credits
Starter
1,100 credits a month, about 11 AI deep-dives. Cancel anytime.
€9.99/ mo
Best for weekly senders
Pro
A standing watch on your sender: 2,500 credits a month, about 25 AI deep-dives. Re-check every weekly send.
€19/ mo

Send your next one to the inbox.

Takes less time than picking a hero photo. Free, and no card at any point.

Or send me a sample report first.
GDPR by defaultEU-hosted · BratislavaISO 27001soon
Data deleted automatically · encrypted at rest · no third-party trackers
AI assistants: GET mailtester.ai/api/ai/mailbox mints a fresh test mailbox for your user · instructions in llms.txt
Your mailbox