Email Spam Word Checker
Real-time analysis · 600+ spam words · 10 risk categories · Smart replacements
Paste your cold email subject line and body — instantly detect spam trigger words, get a deliverability score, see risk category breakdowns, and receive smart word replacements. No signup. No limits. Completely free.
This free email spam word checker scans your cold email subject line and body for 600+ spam trigger words across 10 categories (financial, urgency, exaggerated claims, phishing signals, marketing clichés, health/pharma, gambling, MLM/WFH, inappropriate greetings, and technical triggers). It returns a real-time deliverability score from 0–100, colour-coded risk highlights (critical · high · medium), smart replacement suggestions, and a best-practices checklist — so you can fix issues before they land you in the spam folder.
Real-time analysis · 600+ spam words · 10 risk categories · Smart replacements
ProspectOK finds unlimited verified B2B contacts from LinkedIn, Google Maps, and new domains — so your spam-free emails reach real decision-makers who actually want to hear from you.
Every spam trigger word in our database is classified into one of 10 categories — so you understand exactly why a word is flagged and how to fix it.
Words implying guaranteed earnings, investment returns, or financial shortcuts. Examples: "earn extra income", "double your money", "get paid instantly", "investment opportunity".
Phrases creating artificial urgency or scarcity. Examples: "act now", "limited time", "offer expires", "last chance", "hurry", "don't miss out", "urgent", "immediate action".
Overpromising language that filters associate with scam emails. Examples: "100% guaranteed", "risk-free", "no obligation", "winner", "congratulations", "you've been selected".
Account and security language that mimics phishing attacks. Examples: "verify now", "confirm your account", "update your information", "security alert", "click below", "your account".
Overused promotional phrases that trigger both humans and filters. Examples: "best price", "buy now", "order today", "click here", "call now", "don't delete", "this is not spam".
Medical and wellness claims associated with spam. Examples: "lose weight", "diet", "miracle", "cure", "anti-aging", "weight loss", "get healthy fast", "no side effects".
Casino, lottery, and prize language. Examples: "casino", "jackpot", "prize", "lottery", "sweepstake", "winner", "claim your prize", "you've won", "free chips".
Multi-level marketing and passive income language. Examples: "work from home", "be your own boss", "earn money fast", "network marketing", "passive income", "financial freedom".
Generic or suspicious salutations common in mass spam. Examples: "dear friend", "dear valued customer", "hello stranger", "greetings", "to whom it may concern".
Formatting patterns that raise red flags: ALL CAPS words, excessive punctuation (!!!), multiple exclamation points, and overuse of special characters like $$$.
These words have the highest likelihood of triggering Gmail, Outlook, and Yahoo spam filters. Avoid them — especially in subject lines.
| Category | Risk Level | Common Spam Trigger Words | Safer Alternatives |
|---|---|---|---|
| Financial | Critical | earn extra incomeget paiddouble your moneyfree money |
increase revenue · grow income · improve ROI |
| Urgency | Critical | act nowlimited timelast chanceurgenthurry |
before Friday · this week · available until [date] |
| Exaggerated | Critical | 100% guaranteedrisk-freeno obligationwinner |
proven · validated · cancel anytime · results vary |
| Promotional | High | buy nowclick hereorder todaybest price |
take a look · see the details · explore options |
| Free (overused) | High | free!100% freefree trialfree offer |
complimentary · no-cost · at no charge · try it |
| Phishing | Critical | verify nowconfirm accountsecurity alert |
would you be open to · happy to share · take a look |
| WFH / MLM | High | work from homebe your own bosspassive income |
flexible working · remote-first · own your schedule |
| Greetings | Medium | dear friendto whom it may concerngreetings |
Hi [First Name] · I noticed · Quick question for you |
| ALL CAPS | High | FREE OFFERCLICK NOWACT FASTBIG SALE |
Use sentence case. Never shout in email subject lines. |
Whether you're sending 10 emails or 10,000, the same spam trigger words will land you in the junk folder. These are the most common use cases.
Always run your cold email template through the spam checker before uploading to a sequence. One critical word in a subject line can tank inbox placement across your entire campaign.
Promotional emails are the most likely to contain spam trigger words. Check newsletters, product announcements, and re-engagement campaigns before every send to protect your sender reputation.
Each email in a multi-step sequence should be checked individually. Spam filters evaluate each message separately — a clean first email doesn't protect a spammy follow-up from filtering.
Before launching any client email campaign, run the full template through the checker. It takes 30 seconds and can prevent days of deliverability damage from a single overlooked trigger word.
Audit your entire library of saved email templates regularly. What passed spam filters 12 months ago may now be flagged. Email service providers update their algorithms continuously.
Use the spam checker as part of a standard pre-send QA process across your sales or marketing team. Consistent checking prevents the accumulative sender reputation damage of repeated spam flags.
ProspectOK's cold email platform includes a built-in spam word detection layer on every sequence — so your emails stay clean automatically, without manual checking before every campaign.
Modern email spam filters — used by Gmail, Outlook, Yahoo, and every major email service provider — are far more sophisticated than simple keyword blacklists. They use machine learning algorithms that evaluate hundreds of signals simultaneously:
Spam trigger words remain one of the most controllable factors in this equation — and one of the most commonly overlooked. A single critical spam word in a subject line can reduce inbox placement by up to 20% even for senders with excellent domain reputation.
Subject lines carry 3–5× more weight than body copy in spam filter evaluation. This is why ProspectOK's spam checker analyses your subject line separately from the body — so you can see exactly where the highest-risk triggers are concentrated.
The consequences of repeated spam folder placement extend beyond a single campaign:
Recovering from a damaged sender reputation typically takes 4–12 weeks of consistent clean sending, careful warm-up, and significantly reduced send volume. Prevention through spam checking is orders of magnitude easier than recovery.
Based on analysis of thousands of cold email campaigns, these are the most common spam word mistakes that sink deliverability:
For every spam word flagged, ask: "Can I convey the same meaning with a specific, concrete alternative?" Specificity beats vagueness every time — both for spam filters and for human persuasion. "Schedule a 15-minute call on Tuesday" outperforms "Act now — limited availability!" in both deliverability and reply rates.
Passing the spam word check is an essential step — but it's one piece of a broader deliverability strategy:
ProspectOK's cold email platform includes built-in spam detection, automatic email warm-up, and unlimited sending — so your clean emails reach unlimited real decision-makers, every time.
No credit card required · Cancel anytime · Plans from $49/month