Find out your SpamAssassin score and which content rules are flagging your emails
SpamAssassin is the most widely deployed open-source spam filter, used by millions of mail servers worldwide. It scores each incoming email by testing it against hundreds of rules — content patterns, header analysis, HTML structure, link reputation, and more. Each triggered rule adds points to the score. A score below 3.0 is generally considered clean; above 5.0, most servers will reject or quarantine the email.
Even with perfect SPF, DKIM, and DMARC, your emails can still land in spam if their content triggers too many filter rules. Common culprits include promotional language, excessive images, HTML with JavaScript or iframes, missing unsubscribe headers, and URLs from known shorteners. Knowing your SpamAssassin score — and exactly which rules fired — lets you fix content issues before they cost you inbox placement.
Start by reading the full SpamAssassin rule breakdown that FixMyEmail provides — each rule shows exactly what triggered it and how many points it cost. Remove or rewrite promotional phrases, balance your image-to-text ratio (aim for at least 60% text), strip any JavaScript or iframes from your HTML, and replace URL shorteners with full direct links. Add a List-Unsubscribe header if you're sending marketing or bulk email. Aim for a score below 2.0 to stay well clear of spam thresholds at strict providers.
FixMyEmail checks Spam Score alongside 13 other signals — authentication, server reputation, and content quality — in one free test. No account needed.
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