Email Spam Checker
Analyze your emails for spam trigger words before sending. Get instant feedback to improve deliverability.
How do I check if my email will go to spam?
Paste your email content or subject line below and the tool instantly scans it against 500+ spam trigger words used by Gmail, Outlook, and Yahoo. Review your spam score and the flagged words, then revise and re-test to improve deliverability. Everything runs in your browser, so your content stays private.
Stricter checks for sales outreach (word count, personalization, calendar links)
Paste your email content above to check for spam triggers
How to Check an Email for Spam
To check an email for spam, paste the message into the checker above before you send it. The tool scans your subject line and body against the same signals inbox filters use—trigger words, formatting, link patterns, and SpamAssassin-style rules—and returns an itemized report in seconds, with no signup and no sending required.
1. Paste your email
Copy the body into the Email Content tab, or test your subject line separately in the Subject Line tab.
2. Review flagged issues
Every trigger word, formatting problem, and suspicious link is listed with its severity and category.
3. Fix the high-impact items
Rephrase the words that cost the most points first—most fixes are simple word swaps or removing ALL CAPS and extra punctuation.
4. Re-check until clean
Re-run after each edit. Optionally add your sending domain to check SPF, DKIM, DMARC, and blacklists for a full score.
For the complete pre-send testing workflow—including seed-inbox tests—see our email spam checker guide.
What Does Your Email Spam Score Mean?
An email spam score is a numeric estimate of how likely your message is to be filtered before it reaches the inbox. When you check your email spam score with this tool, you get two readings: a 0–100 content health score (higher is better) and a SpamAssassin-style score, where most mail servers filter anything above 5 points.
Health 80–100
Low spam risk. Your content is clean—deliverability now depends on sender reputation and authentication.
Health 60–79
Some concerns. Review the flagged words and formatting issues and fix the highest-severity ones.
Health below 60
Significant spam risk. This email will likely be filtered—revise it before sending.
Different tools use different scales (SpamAssassin, Mail-Tester, Postmark, Google Postmaster). Our guide to what a spam score is decodes each one and shows how to lower yours.
How to Check an Email for Spam Words
To check an email for spam words, paste it into the analyzer above—it flags every match from a database of 500+ trigger words, grouped by category and severity. No single word sends an email to spam; filters score combinations, so the checker shows you which words stack up the most risk in your specific draft.
The categories that fire most often: money and free offers ("free money," "no cost"), urgency and pressure ("act now," "limited time"), exaggerated claims ("guaranteed," "risk-free"), and phishing-style requests ("verify your account," "click here"). Formatting acts like a trigger word too—ALL CAPS, multiple exclamation marks, and $$$ symbols amplify everything else.
Want the full categorized list with safe alternatives for each phrase? See our complete spam trigger words list.
How This Spam Mail Checker Works
This spam mail checker runs entirely in your browser: your email content is never sent to a server, stored, or shared. It combines a 500+ trigger-word database with SpamAssassin-style scoring rules to analyze your content, then optionally checks your sending domain's SPF, DKIM, DMARC, and blacklist status via DNS to produce a unified deliverability score.
Content rules
Trigger words, ALL CAPS, punctuation, link density, URL shorteners, and readability—scored the way rule engines score them.
Domain checks
Optional SPF, DKIM, and DMARC lookups plus blacklist checks on your sending domain, weighted into the final score.
Private by design
Analysis is client-side and unlimited. Only the optional domain check makes DNS queries—your email text stays on your machine.
How Spam Filters Work
Modern email providers like Gmail and Outlook use sophisticated, multi-layered systems to protect users from spam. Understanding these systems helps you craft emails that reach the inbox.
Content Analysis
Filters scan for spam trigger words, suspicious links, and unusual formatting patterns.
Sender Reputation
Your domain's history, IP reputation, and authentication (SPF, DKIM, DMARC) matter.
User Behavior
Open rates, replies, and spam reports from recipients influence future deliverability.
Subject Line Best Practices
Do
- • Keep it 30-50 characters for mobile visibility
- • Use personalization (recipient's name, company)
- • Be specific about the value you're offering
- • Create curiosity without being clickbait
- • Test different versions (A/B testing)
Don't
- • Use ALL CAPS (it looks like shouting)
- • Add multiple exclamation marks!!!
- • Use spam trigger words (free, urgent, act now)
- • Add misleading RE: or FW: prefixes
- • Overuse emojis (1 max is fine)
Frequently Asked Questions
Is the email spam checker completely free?+
Yes, our email spam checker is 100% free with unlimited usage. We don't require sign-up or credit card. Your email content is analyzed client-side and never stored on our servers.
How accurate is the spam score?+
Our spam checker analyzes 500+ known trigger words used by major email providers like Gmail, Outlook, and Yahoo. While no tool can guarantee inbox delivery (since spam filters also consider sender reputation and engagement), avoiding flagged words significantly improves your chances.
Is my email content private?+
Absolutely. All analysis happens in your browser (client-side). Your email content is never sent to our servers, stored, or shared with anyone. We take privacy seriously.
What is a good spam score?+
For email content, aim for a health score of 80 or higher (meaning low spam risk). Scores between 60-80 indicate some concerns worth addressing. Below 60 means your email has significant spam risk and needs revision.
I have a good score but emails still go to spam. Why?+
Content is only one factor. Spam filters also consider: sender reputation (IP/domain history), authentication (SPF, DKIM, DMARC), engagement rates, and list quality. If your list contains invalid emails causing bounces, that damages your sender reputation. Consider verifying your email list with Enrichley.
What's the ideal subject line length?+
Research shows 30-50 characters is optimal. This ensures your subject is fully visible on mobile devices while giving enough room to convey value. Our tool shows exactly how your subject will appear on mobile vs desktop.
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