What Are Spam Trigger Words? Full List + Checker
Also known as Spam words, Spammy words, Spam filter words
Spam trigger words are words and phrases often found in spam or aggressive marketing, such as 'act now', 'guaranteed', 'risk-free' or 'free money', that can make an email look suspicious to readers and some filters. Modern filters rely more on sender reputation and engagement than word lists, but spammy wording still adds risk to cold emails.
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Open the toolSpam Trigger Words explained
Early spam filters scored emails by counting suspicious words. Today's filters at Gmail and Microsoft use machine learning that weighs sender reputation, authentication, sending patterns and how recipients react. A single word rarely sends an email to spam on its own. But the content still counts as one signal, and some corporate filters remain more rule-based.
Trigger words fall into a few groups: money and pricing ('cash', 'lowest price', 'no fees'), urgency ('act now', 'limited time', 'expires today'), exaggerated claims ('guaranteed', '100% free', 'miracle'), and shady phrasing ('no catch', 'this isn't spam', 'click here'). Heavy capitalization, rows of exclamation marks and many links in one email make the same impression on readers.
The bigger effect is on people. Spammy wording makes your email look like a campaign, which lowers replies and raises spam complaints, and complaints do hurt deliverability. So the best reason to avoid trigger words is to sound like a real person writing to one other person. Run copy through a spam word checker as a final pass, not as your main deliverability strategy.
Spam Trigger Words example
A first draft reads: 'Act now! Get a FREE, risk-free audit guaranteed to double your leads. Click here before this limited-time offer expires!' A rewrite reads: 'Noticed your team is hiring two SDRs. We put together short pipeline audits for teams at that stage. Want me to send one over?' The second has no trigger words and sounds like a person.
How to avoid spam trigger words
Write like a colleague
Draft the email as a short note to one person, which naturally avoids most promotional wording.
Run a word check
Paste the copy into a spam word checker and review flagged words in context, rather than deleting blindly.
Cut urgency and hype
Remove phrases like act now, limited time, guaranteed and 100%, and replace them with specific, factual statements.
Limit formatting and links
Avoid all caps, multiple exclamation marks, colored text and more than one link in a cold email.
Fix the fundamentals
Check authentication, warm-up, list quality and complaint rates, which matter far more than individual words.
Common mistakes
- Believing that removing trigger words will fix deliverability while bounce and complaint rates stay high.
- Using odd spellings like 'fr33' to dodge filters, which looks more suspicious to both people and filters.
- Deleting normal words like 'free' from an otherwise plain, relevant email and making the sentence awkward.
- Ignoring formatting signals such as all caps, many exclamation marks and several links in one email.
Spam Trigger Words FAQ
Less than they used to. Major mailbox providers rely mostly on sender reputation, authentication and recipient engagement. Words still contribute to how an email is judged, and some corporate filters use content rules, so avoiding obvious spam language remains sensible.
Common examples include 'act now', 'limited time', 'guaranteed', 'risk-free', '100% free', 'no catch', 'cash bonus', 'lowest price', 'click here' and 'this is not spam'. Excessive capitals and exclamation marks send a similar signal.
Rarely on its own. Filters combine many signals, so one word in an otherwise clean email from a reputable sender is usually fine. Many trigger words together, plus a new or low-reputation domain, add up to a much higher risk.
It appears on most spam word lists, especially in phrases like '100% free' or 'free money'. In a plain sentence like 'free to share it', it is unlikely to cause problems alone. Avoid it in subject lines and in hype-heavy phrases.