Why certain words sink a cold email
Spam filters and readers both react to the same signals: language that sounds like a mass promotion rather than a personal note. A single trigger word rarely blocks you on its own, but stacking several - urgency, money, hype, fake familiarity - raises the score until the message lands in spam or gets deleted on sight. The goal is not to memorize a banned list; it is to sound like a real person writing to one specific reader. It is worth the care: in Backlinko's analysis of 12 million outreach emails, only 8.5% earned any reply, so spammy wording spends an already-scarce chance on language filters and readers both distrust.
The trigger phrases to cut
These patterns do the most damage. Replace each with a plain, specific statement about the reader and your offer.
- Urgency and pressure: "act now", "limited time", "offer expires", "don't miss out".
- Money and hype: "free", "guaranteed", "double your revenue", "100%", "risk-free".
- Fake familiarity: a "Re:" or "Fwd:" subject on a first-ever email, or "as we discussed".
- Clickbait: "you won't believe", ALL-CAPS words, and three exclamation marks.
Formatting mistakes filters notice
It is not only words. A first cold email with several links, a leftover merge tag like {{FirstName}}, an image-heavy body, or a subject in capital letters all raise the spam score. Keep it to plain text, one link at most, and a subject written in normal sentence case. A leaked merge tag is the clearest possible sign of a bulk send, so proof every message before it goes out.
What to write instead
Swap the trigger for the truth. Instead of "free guaranteed results", name the one concrete outcome you help with. Instead of manufactured urgency, give a real, low-pressure reason to reply now. The safest cold email reads like a note you would send a colleague: one honest observation, one clear ask, your real name and a way to opt out. Run the draft through a spam checker to catch anything you missed before sending.
- Lead with one specific, public detail about the reader.
- State one concrete outcome, not a hype claim.
- One link maximum; plain text; honest subject.
- Include a real opt-out and your real identity.
FAQ
Questions people ask before using this
Do spam trigger words guarantee the spam folder?
No single word does. Filters score the whole message plus your domain reputation and authentication. But stacking several trigger phrases, links, and ALL-CAPS reliably pushes a cold email toward spam, so cutting them is worth it.
Is the word "free" always bad in a cold email?
It is a common trigger, but context matters. "Free" in a hype phrase ("free guaranteed money") hurts; a plain "free to try" is far milder. When in doubt, rewrite it as a specific, factual statement.
What is the single worst mistake?
A leftover merge tag - a literal "{{FirstName}}" that never got replaced. It instantly marks the email as an untargeted blast to both the filter and the reader.
How do I check a draft before sending?
Run the subject and body through a cold email spam checker that flags trigger words, links, ALL-CAPS, and merge tags, then fix what it finds. It checks the message text, not your domain setup, so also confirm SPF, DKIM, and DMARC are in place.