What are spam trigger words?
Spam trigger words are the words and phrases that show up again and again in spam: "act now", "100% free", "risk-free", "you have been selected". Spam filters learned them from millions of junk emails, and so did your readers.
One of them on its own rarely sends an email to spam. What hurts is the pattern: a subject line in capitals, three exclamation marks, a deadline that is not real and a promise that sounds too good. Each one adds a little suspicion, and together they tip a filter over the edge.
The checker above reads your subject line and your email the way a wary reader would. It highlights every trigger in place, tells you why it reads as spam, and suggests a plainer way to say the same thing.
Common spam trigger words, by category
Most spam words fall into a handful of families. Knowing them is more useful than memorising a list of 500 words.
- Urgency. "Act now", "last chance", "expires today", "only a few hours left". A real deadline is fine; inventing one is what spam does.
- Money. "Cash", "earn $", "lowest price", "best rates", "double your income". Prices are fine in a product email; money as the hook is not.
- Too good to be true. "Guaranteed", "risk-free", "no catch", "miracle", "100% satisfied". The bigger the promise, the less a filter trusts it.
- Sales pressure. "Buy now", "order today", "click here", "don't delete this". Pushy calls to action read as a pitch, not as a message.
- Scam signals. "This is not spam", "verify your account", "dear friend", "you have been selected". These are the phrases phishing relies on, and filters weigh them heavily.
- Formatting. WORDS IN CAPITALS, runs of
!!!or???,$$$. Shouting is the oldest spam signal there is.
Do spam words really send your email to spam?
Less than they used to. Modern filters at Gmail and Outlook decide mostly on who is sending: your domain's reputation, whether SPF, DKIM and DMARC are in place, and how people react to your emails. Do they open them, reply, or mark them as spam?
Words still matter in two ways. For new or small senders, with little reputation to lean on, the content weighs more in the decision. And for people, a subject line that sounds like spam gets ignored or reported, and every report damages the reputation that filters look at first.
So treat this as one check among several. Clean wording will not save an email sent from a domain with a broken setup. Check that side too with our free Deliverability Setup Checker.
How to avoid spam filters with your wording
Rewriting a spammy email is mostly about sounding like a person again.
- Write the subject line like a note to one person. "Your March report is ready" beats "AMAZING results inside!!!". Specific and calm wins.
- Say the offer plainly. "20% off the annual plan until Friday" is honest. "HUGE SAVINGS, ACT NOW" is the same offer dressed as spam.
- One clear call to action. A single descriptive link like "See the new dashboard" works better than "click here" three times.
- Drop the capitals and stacked punctuation. One exclamation mark in a whole email is plenty.
- Keep a real balance of text and links. An email that is mostly links or one big image gives filters little reason to trust it.
- Send people what they asked for. Emails people expect get opened, and opens build the reputation that matters more than any word.
How the spam words checker works
Your subject line and email are read by an AI model that knows how spam is written. It flags the phrases that a filter or a reader would react to, and leaves ordinary words alone: "free" in "feel free to reply" is fine, "100% FREE" is not.
Each trigger gets a severity. High for phrases tied to spam and scams, Medium for typical promotional triggers, Low for mild ones that only hurt in numbers. Triggers in the subject line count double in the overall risk, because the subject is what filters and people read first.
Your text is used for the check and nothing else. We do not store it, and it is not used to train any model.