InfraSuite Tools
Spam Word Checker
Paste a subject line and body copy to see which words, phrases and formatting patterns spam filters penalize, how the risk breaks down by category, and what to write instead — plus structural checks on subject length, links and text-to-image balance.
Check your copy
Scored against 679+ trigger words and formatting patterns across 12 categories. Subject line triggers hurt the most, so they are scored alongside the body.
Overall risk
Paste a subject line and body copy to score it.
Risk by category
No trigger categories detected.
Your copy, flagged
Nothing pasted yet — your copy will appear here with every trigger highlighted.
Structure and formatting
0 failing · 0 to reviewFilters weigh the shape of a message as well as its wording. These checks are scored separately from the trigger words above.
No subject line entered.
Add one to check it against the 50-character guideline.
No links — nothing here for a filter to weigh.
Text only — no images to unbalance the message.
No opt-out line detected.
A plain-English opt-out ("let me know and I'll stop reaching out") keeps you compliant and earns fewer spam complaints than no exit at all.
Triggers and safer alternatives
Filters score these signals in aggregate, so swapping the top few lines is usually enough to drop a message out of the medium band.
No trigger words or patterns found. Nothing to swap out.
What this tool checks for
Money & financial
Promises of money, credit, debt or financial products. Filters were trained on decades of loan scams and get-rich schemes.
Get rich quick & MLM
Multi-level-marketing and pyramid-scheme phrasing. Any “work from home + fast money” combination almost guarantees a spam classification.
Free & discounts
“Free” is not automatically toxic, but stacking free-related phrases with promotional urgency lights up filters immediately.
Urgency & scarcity
Manufactured urgency is one of the strongest spam signals. Filters flag “Act now” because scammers overuse it, so keep urgency real and specific.
Guarantees & promises
Filters treat guarantees skeptically because scammers rely on them. Real guarantees should be specific: 30 days, money-back, terms link.
Hype & exaggeration
Superlatives without evidence are classic spam markers. Filters expect real senders to substantiate claims; empty hype adds points to every message.
Medical & pharma
Pharmaceutical spam is one of the oldest and most heavily scored categories. Any unlicensed medical claim is treated as spam or phishing by default.
Adult, dating & gambling
Hard-blocked by default at most workplaces. Any occurrence typically routes the message straight to spam or a reject.
Prizes & sweepstakes
A legacy scam pattern. Legitimate contests specify entrant conditions, sponsor identity and drawing dates; bare “you won” language flags every time.
Clickbait & manipulation
Vague curiosity gaps and manipulation phrasing are heavily penalized. Filters were trained on scammy “Dear friend” letters and clickbait patterns.
Deceptive & phishing
Phishing-style language is aggressively filtered because it costs users money and providers reputation. Even legitimate account emails should add strong context.
Symbols & punctuation traps
Filters analyze formatting as much as words. Excessive punctuation, decorated fonts and emoji stacks are heavily penalized because they mimic scammer aesthetics.