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FREE TOOL · NO SIGNUP

Email Spam Test: how spammy does your mail really read?

Spam score for your mail in seconds. We check subject, HTML-to-text ratio, banned trigger words, SPF/DKIM/DMARC setup and ship a concrete fix list.

★★★★★ 4.7 / 5 · 184 reviews
8.9k
Tests / month
25+
Spam signals
5s
per test
TOOL · 02 / 09
Email Spam Test
Subject · Body · AuthFREE

1

Copy the details below and send the email from your email client:

Subject:

Check email deliverability

Message:

Hello Mandokit, please check the deliverability of my email address. My verification code: ...... Thank you!

Send the email exactly as you would send it to your recipients – with your normal sender address and your usual signature.

Have you sent the email? Click Next to start the spam check.

By using this tool you agree to our Terms and Privacy Policy

Your data is safe

Email deleted immediately

Your test email is automatically and permanently deleted from our server after analysis. We store neither the content nor the sender.

No result storage

Your spam report is not stored. Once you leave the page, all data is permanently deleted.

No sharing

Your email data is not shared with third parties, not sold and not used for marketing. No tracking, no databases.

GDPR compliant

Our email spam test complies with the General Data Protection Regulation (GDPR). Processing is done exclusively on servers in the EU. No account needed.

EMAIL SPAM TEST — THE GUIDE

When does a mail land in the spam folder?

ON THIS PAGE
  1. What is Email Spam Test?
  2. Why do you need this?
  3. Step-by-step in 4 steps
  4. What gets checked?
  5. Glossary
  6. FAQ

When does a mail land in the spam folder?

Spam filters combine hundreds of signals: auth records, reputation, content, frequency. The Mandokit Spam Test reproduces the most important heuristics from SpamAssassin, Gmail Postmaster and Microsoft SNDS and tells you what’s problematic about your mail — before you hit Send.

Why test your mail before sending?

Spam filters get more aggressive every quarter. What landed two years ago is junk today:

  • Subject filters. Certain words in the subject (free!!, FREE, $$$) are instant triggers.
  • HTML-to-text. Pure HTML mails without a plaintext variant lose points.
  • Image ratio. Over 60% image content = classic spam pattern.
  • Missing auth. No SPF/DKIM/DMARC = straight to junk on Gmail.

Step-by-step: Spam Test in 4 steps

  1. 1
    Paste the mail
    Subject + plaintext + HTML into the tool, or send a test mail to our probe address.
  2. 2
    Run the test
    We run 25+ heuristics — content, auth, sender-domain reputation.
  3. 3
    Read the score
    0 = clean, 5+ = spam suspect, 10+ = guaranteed junk folder. Plus concrete issues.
  4. 4
    Fix & re-test
    Each recommendation as a checkbox. Run it again and watch the score drop.

What gets checked?

We combine SpamAssassin rules with our own checks for modern inbox providers.

Subject analysis
Caps lock, special chars, trigger words.
Plaintext variant
Does it exist? Does it match the HTML?
Image ratio
Pixel-to-text ratio.
Suspicious links
URL shorteners, mixed domains, IP addresses.
SPF / DKIM / DMARC
Fully configured?
Sender reputation
DNSBL, domain age, whois privacy.
Attachments
Type, size, double extensions.
Headers
From/Reply-To mismatch, Return-Path.
GLOSSARY

Spam-filter vocabulary

SpamAssassin
Open-source spam filter whose rules are still the standard vocabulary for spam scoring.
Spam score
Numeric value. 5+ = suspect, 10+ = guaranteed spam.
Postmaster
Reporting tool from Gmail/Microsoft for high-volume senders.
DNSBL
DNS-based blacklist. Sender IP/domain on it = instant spam.
Greylisting
Mail server rejects on the first attempt, accepts on the second.
Tarpit
Server replies extremely slowly on purpose to slow spammers down.
Reputation score
Aggregate value across IP, domain, content history.
Honeypot
Addresses that exist only to catch spammers.
WHO USES IT

Who tests spam scores?

Email marketers
Score-check before every newsletter send.
Sales ops
Iterate on cold-outreach templates until score ≤ 2.
Transactional
Welcome mails, invoices, reset mails — a single junk classification kills conversions.
Agencies
Add a QA step before sending on behalf of clients.
Domain switch
After migration, test that all auth records are correctly set up.
FAQ

FAQ for Email Spam Test

Do I need a real email for the test?
Either paste subject + body, or send a test mail to our probe address — the latter realistically tests auth records too.
What does a score of 4 mean?
Borderline. Some filters let it through, others mark as junk. Above 5 is spam suspect.
Which filters are simulated?
SpamAssassin (weighted rules), Gmail-style content heuristics, Microsoft filter logic.
Will my mail be stored?
No. We analyse in-memory and forget immediately.
How often should I test?
On every template change, at minimum once per quarter.
Does this help against greylisting?
Greylisting is not a spam score. We flag it separately.
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