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.

Test your email See how it works

Free: 2 tests a day, or 5 with a free account. No card needed.

Sample report Edit the subject or break a check to see the score change.

Your email

Yourshophello@yourshop.co.uk

Score

0.0/10

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.

    1. Get a test address

      We create a fresh address for each test.

      2aeab699…b666@mg.spambarometer.com

    2. 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.

    3. 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
    SPF and DKIM pass, but for your provider’s domain, not yours. DMARC needs at least one of them to match yourshop.co.uk. Set up a custom sending domain with your email provider.

    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.

    RuleWhat it meansPoints
    HTML_IMAGE_ONLY_24Almost no text, mostly images+1.3
    SUBJ_ALL_CAPSSubject written in capitals+0.5
    MIME_HTML_ONLYNo plain-text version+0.1
    DKIM_VALIDDKIM 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.

    Your subject

    FINAL HOURS!!! 50% OFF EVERYTHING

    Suggested

    Last day: 50% off everything in store

    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
    Create a free account

    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
    See Premium

    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 guide

    How spam filters work

    What filters look at, how scores add up, and why good email still gets caught.

    Read guide

    Building sender reputation

    How mailbox providers decide to trust you, and how to earn it back once it’s lost.

    Read guide
    All guides

    What 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.