Answer first
Spam trigger words are phrases filters associate with spam, like “100% free” and “act now”.
One of them rarely sinks an email on its own, but stacking several, shouting in capitals and piling on “!!!” adds up. Texts are stricter: carriers filter whole topics such as cannabis, payday loans and gambling, however they are worded.
- Emails
- Words add up with format and sender reputation
- Texts
- Restricted topics are filtered by carriers
01 / Reality
How much spam words really matter
Gmail, Yahoo and Microsoft don’t publish a list of banned words. Their filters weigh who is sending, whether the domain is authenticated, and how readers react, alongside the content. The one spam filter whose rules are public, Apache SpamAssassin, gives a single phrase only a small score, well below the point where it would block an email by itself.
So why bother? Because words still add to the total. A message that says “URGENT!!! 100% FREE cash, act now” stacks several signals at once, reads like spam to people too, and gets reported. We reviewed 19 published email lists and 26 texting-provider and carrier policies to build the lists below and the scoring in our checkers. Treat them as a strong recommendation, not a rulebook.
02 / Email
Email spam trigger words by category
| Category | Examples | Why filters care |
|---|---|---|
| Too-good promises | 100% free, risk-free, no catch, no strings attached, guaranteed, satisfaction guaranteed, zero risk | Absolute claims are the classic spam pattern. |
| Pressure | act now, urgent, limited time, last chance, expiring soon, don’t miss out, buy now, click here | Manufactured urgency is a scam hallmark. |
| Money claims | earn extra cash, make money fast, double your income, cash bonus, $$$, unclaimed funds | Income claims are heavily filtered. |
| Phishing-style phrases | verify your account, account suspended, unusual activity, confirm your identity, final notice, suspicious activity | They mimic security alerts used to steal logins. |
| Hype | amazing, miracle, incredible deal, once in a lifetime, mega sale, unbelievable results | Exaggeration reads as bulk promotion. |
| Bulk-mail greetings | dear friend, dear valued customer, dear sir or madam, to whom it may concern | Generic greetings suggest a mass mailing. |
| Pharmacy and health | no prescription needed, viagra, weight loss, doctors recommend | Long-running pharmacy spam. |
Formatting counts as well: whole words in capitals, runs of “!!!”, link shorteners such as bit.ly, a missing unsubscribe line, and an email that is mostly one big image.
03 / Texts
Text message trigger words and restricted topics
Business texts in the US go through carrier filtering, and carriers and texting providers restrict whole categories of content. In these, no rewording makes a promotion deliverable; the rules apply to the type of business.
- Cannabis and drugs: cannabis, CBD, THC, dispensary, kratom, edibles, paraphernalia. Not carried on US business texting, even where legal to sell.
- Sexual content: explicit or adult wording. Not carried.
- Gambling: casino promotions, betting, sportsbook, wager, raffles. Not carried; a venue can still text non-gambling updates.
- High-risk lending and debt programs: payday loan, cash advance, no credit check, guaranteed approval, debt relief, debt consolidation, credit repair. Restricted by carriers and many providers.
- Get-rich offers: work-from-home schemes, MLM, investment opportunities, secret shopper. Not carried.
- Crypto and stock tips: restricted by many providers.
- Age-restricted products: alcohol is allowed to adults when the number is registered for it and sign-ups are age-checked with a date of birth. Tobacco, vape and firearms are allowed by some carriers with age checks, but many providers restrict them.
Texts also get filtered for public link shorteners, missing “Reply STOP to opt out” lines and messages that don’t say who is texting. Our SMS compliance guide and 10DLC guide cover the registration side.
04 / Swaps
Safer swaps for common trigger words
| Instead of | Try |
|---|---|
| Act now | When you’re ready |
| Urgent | Time-sensitive |
| Limited time | For a short time, or a real date (“until Friday”) |
| Click here | See the details, or say where the link goes |
| Free quote | Complimentary quote |
| No obligation | No pressure |
| Cheap | Affordable |
| Last chance | Final days |
| Dear friend | Hi, and the person’s name |
Swap words only when the meaning survives. If your business sells something in a restricted category, a vaguer word doesn’t change the rules; register for your real use case instead. The email spam checker underlines trigger words in your draft, rates each one and suggests a safer swap.
05 / Beyond
What matters more than words
- Authentication: SPF, DKIM and DMARC set up for your sending domain.
- Consent and list quality: email people who asked to hear from you, and remove bounces.
- Complaints: make unsubscribing easy; a spam report hurts far more than an unsubscribe.
- For texts: a registered number (10DLC or toll-free verification), a clear opt-in, and your business name in the message.
Our email deliverability guide walks through each of these for a small team.
Frequently asked questions
What words trigger spam filters?
Phrases associated with spam, such as “100% free”, “act now”, “risk-free”, “verify your account” and “earn extra cash”, plus formatting like ALL CAPS and “!!!”. In texts, whole topics such as cannabis, payday loans and gambling are filtered.
Does Gmail have a list of spam words?
No. Gmail doesn’t publish one. It weighs sender reputation, authentication, user reports and content together.
Will one spam word send my email to spam?
Rarely on its own. Problems start when several triggers stack up, or when the sender has a poor reputation.
Is “free” a spam word?
On its own it is mild. “100% free”, “free money” and “free gift” are stronger signals, and repeating “free” through an email adds up.
Which words get text messages blocked?
Carriers filter restricted topics (cannabis and CBD, gambling, high-risk lending and debt programs, get-rich offers, adult content) and patterns like public link shorteners and missing opt-out lines.
How do I check my email for spam words?
Paste it into the free email spam checker. It underlines trigger words, scores the email 0 to 100 and suggests safer swaps.