Spam Words Checker for Cold Email

What spam trigger words actually do in 2026

Modern spam filters at Google and Microsoft are machine-learning systems, not word lists. A single word like "free" will not put you in spam on its own. What filters learn is the combination of signals that promotional and abusive email share: pressure language, money talk, superlatives, heavy formatting, multiple links and a sender with no engagement history.

Cold email is judged more harshly than newsletters because the recipient never opted in. Your domain is young, your recipients have never replied, and any promotional pattern tips the balance. That is why trimming trigger phrases still matters: it removes the easy signals so your reputation and copy relevance can carry the email.

How the spam score is calculated

The checker scans your subject and body against a list of more than 200 phrases grouped into five categories. Each category carries a weight: shady phrases ("this is not spam", "wire transfer") cost the most, money and urgency phrases next, hype and salesy clichés the least. Hits in the subject line count 1.5x because the subject is what filters and humans see first.

• Density matters: the same three triggers hurt a 40-word email more than a 150-word one.
• Formatting deductions: ALL CAPS above 15% of letters, three or more exclamation marks, two or more links, and repeated prices or percentages.
• Length and hygiene: subjects over 70 characters, bodies over 200 words, and missing opt-out language are flagged.
• Scores above 85 are inbox-ready, 65–85 need light edits, below 45 read as a promotion.

The five categories, and what to write instead

Urgency and pressure ("act now", "limited time") signal a promotion; replace with a specific, calm reason to reply this week. Money and offers ("free", "discount", "$$$") belong in a later email once there is a conversation; in a first touch, describe the outcome instead of the price. Hype ("revolutionary", "guaranteed") is easy to cut: say what you did for a similar company in one plain sentence.

Shady phrases ("not spam", "dear friend", "click to remove") are the strongest negative signal because legitimate senders never use them. Salesy clichés ("hope this finds you well", "just following up", "quick question") are not filter triggers so much as human ones; they mark the email as a template and cost you replies.

Why copy is only a third of deliverability

If your email scores 95 and still lands in spam, the cause is almost always infrastructure: a domain without SPF, DKIM and DMARC, an inbox sending 150 emails on day one, or a shared IP with a bad neighbor. Use the SPF, DKIM and DMARC generators to fix authentication, the warmup calculator to ramp volume safely, and keep sending under 50 emails per inbox per day. ColdBox automates all three for every connected inbox, which is how teams hold 95%+ inbox placement at scale.