Find out why your email goes to spam.
Send one email to a test address. We run it through SpamAssassin, check SPF, DKIM and DMARC, and explain every problem in plain English, with the fix.
Free: 2 tests a day, or 5 with a free account. No card needed.
Your email
Score
Select a check to break or fix it.
To fix, most important first 0
Example weights for this demo. Your real report uses SpamAssassin’s actual scores.
How it works
No setup and nothing to install. Usually under a minute from send to report.
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Get a test address
We create a fresh address for each test.
2aeab699…b666@mg.spambarometer.com -
Send it a real email
Send from the tool you actually use, whether that’s Mailchimp, HubSpot, your CRM or your own server, so we test your real setup.
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Read your report
Your score, every rule you triggered, your authentication results, and the fixes in order of impact.
What’s in your report
Every check is explained, so you know exactly what to change and why.
Authentication, translated
We read the headers receiving servers see and check SPF, DKIM and DMARC, including the alignment problems most checkers miss.
Then we tell you what it means for your domain, not just whether it passed.
Authentication-Results: mx.spambarometer.com; spf=pass smtp.mailfrom=bounce.mailer-esp.net; dkim=pass header.d=mailer-esp.net; dmarc=fail (p=quarantine) header.from=yourshop.co.uk
Every spam rule, scored
Your email runs through SpamAssassin, the open-source filter behind spam scoring at many mail providers. You see every rule it triggers, what each one adds, and what it means.
| Rule | What it means | Points |
|---|---|---|
| HTML_IMAGE_ONLY_24 | Almost no text, mostly images | +1.3 |
| SUBJ_ALL_CAPS | Subject written in capitals | +0.5 |
| MIME_HTML_ONLY | No plain-text version | +0.1 |
| DKIM_VALID | DKIM signature checks out | −0.1 |
Suggested rewrites Premium
AI suggestions for your subject line and body copy, ranked by how much each one should help.
FINAL HOURS!!! 50% OFF EVERYTHING
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Sentence case and a single clear offer. This removes two triggered rules.
Start free. Upgrade when you send more.
Free
No card needed
£0
- 2 tests a day without an account
- 5 tests a day with a free account
- Full spam and authentication analysis
- Plain-English recommendations
Premium
For regular senders
£9.99 a month
- 50 tests a day
- AI rewrites for subject and body
- 30 days of test history
- PDF reports to share
- Priority support
Need more than 50 tests a day? Talk to us.
Learn the fundamentals
SPF records explained
What an SPF record does, how to write one, and the 10-lookup limit that quietly breaks it.
Read guideHow spam filters work
What filters look at, how scores add up, and why good email still gets caught.
Read guideBuilding sender reputation
How mailbox providers decide to trust you, and how to earn it back once it’s lost.
Read guideWhat is email deliverability?
Deliverability is whether your email reaches the inbox rather than the spam folder, or gets blocked outright. Well-written email still fails if the sending domain isn’t authenticated, the content trips spam filters, or a technical problem goes unnoticed. The result is lost revenue, missed messages and a damaged sender reputation.
Whether you send receipts, newsletters or cold outreach, testing is the first step to reliable inbox placement. One test gets you your authentication results, the spam rules you trigger, and a review of your content.