455+ Spam Trigger Words to Avoid in Emails
Spam filters scan your emails for patterns that look like junk mail. Certain words, especially combined with poor formatting and weak sender reputation, dramatically increase the chance your email lands in spam.
Below is a categorized list of 455+ words and phrases to watch for. Use our free spam word checker to scan your emails instantly.
Urgency and pressure words
| Avoid these urgency triggers | |||
|---|---|---|---|
| Act now | Action required | Apply now | Before it's too late |
| Call now | Can't wait | Deadline | Do it today |
| Don't delete | Don't hesitate | Don't miss out | Expires |
| Final call | For instant access | Get it now | Get started now |
| Hurry | Hurry up | Immediately | Instant |
| Last chance | Last day | Limited time | Now |
| Now only | Offer expires | Once in a lifetime | Only today |
| Order now | Please read | Right now | Rush |
| Supplies limited | Take action | Time limited | Top urgent |
| Urgent | What are you waiting for | While supplies last | You're missing out |
Money and financial words
| Avoid these financial triggers | |||
|---|---|---|---|
| $$$ | Affordable | Bargain | Best price |
| Big bucks | Billion | Cash | Cash bonus |
| Cashback | Cheap | Check or money order | Collect |
| Cost | Credit | Discount | Dollar |
| Double your | Earn | Earn extra cash | Earn money |
| Easy money | Extra cash | Extra income | Fast cash |
| Financial freedom | Free | Free gift | Free trial |
| Full refund | Get paid | Income | Incredible deal |
| Investment | Lowest price | Make money | Million |
| Money | Money back | Mortgage | No catch |
| No cost | No fees | No hidden costs | Pennies a day |
| Price | Profit | Save big | Save money |
Exaggerated claims
| Avoid these hype words | |||
|---|---|---|---|
| 100% | 100% free | 100% satisfied | Amazing |
| Be amazed | Best | Breakthrough | Cancel anytime |
| Certified | Congratulations | Exclusive deal | Fantastic |
| Guaranteed | Incredible | It's effective | Lifetime |
| Miracle | Never before | No questions asked | No strings attached |
| Once in a lifetime | Outstanding | Promise you | Pure profit |
| Real thing | Revolutionary | Risk free | Satisfaction guaranteed |
| Special | The best | Unbelievable | Unlimited |
| Unsurpassed | Winner | Wonderful | You won't believe |
Shady and deceptive words
| Avoid these trust-killing words | |||
|---|---|---|---|
| Accept credit cards | As seen on | Auto email removal | Billing address |
| Bulk email | Buy | Buying | Cable |
| Chance | Click below | Click here | Click to remove |
| Confidentially | Deal | Dear friend | Direct email |
| Don't delete this | Email harvest | For free | For just |
| Freedom | Friend | Hidden | Human growth hormone |
| If you wish | In accordance with | Join | Leave |
| Legal | Long distance | Multi-level marketing | No obligation |
| No purchase necessary | Not spam | Notspam | Obligation |
| Opt in | Per request | Pre-approved | Problem |
| Removal | Remove | Reply remove | Request |
| Requires initial investment | Score | Social security number | Success |
| This isn't spam | Undisclosed | Unsolicited | Valium |
Sales and marketing words
| Use sparingly in outreach | |||
|---|---|---|---|
| Ad | Auto email removal | Banner | Bonus |
| Brand new | Buying | Clearance | Compare |
| Coupon | Direct marketing | Gift card | Give away |
| Increase sales | Join millions | Marketing | Mass email |
| Member | Offer | Online shopping | Open |
| Opt-in | Order | Performance | Prize |
| Promotion | Purchase | Sale | Sales |
| Sample | Satisfaction | Shopping | Solution |
| Special offer | Special promotion | Subscribe | Trial |
Medical and supplement words
| High spam risk, avoid entirely | |||
|---|---|---|---|
| Cure | Diagnose | Diet | Lose weight |
| Medicine | No medical questions | Pharmacy | Prescription |
| Remedy | Supplement | Testosterone | Viagra |
| Weight loss | Work out | Xanax | Enhancement |
Which factor matters MOST for email deliverability?
Correct! Sender reputation is the #1 factor. A sender with excellent reputation can use some trigger words without issues. A sender with poor reputation will hit spam even with clean content.
Sender reputation is the dominant factor. Spam filters weigh your authentication (SPF/DKIM/DMARC), engagement rates, and complaint history far more than individual words.
Beyond words: other spam triggers
Spam filters look at far more than just words. These patterns also raise red flags:
| Trigger | Why it hurts | Weight |
|---|---|---|
| ALL CAPS text | Signals aggressive, spammy intent | High |
| Excessive punctuation (!!!) | Looks unprofessional and salesy | High |
| Image-heavy, text-light | Hiding text in images is a known spam tactic | High |
| Too many links | Multiple links in a short email looks like phishing | Medium |
| Red/colored fonts | Associated with scam emails | Medium |
| Large attachments | Suspicious, especially .exe, .zip files | High |
| Missing unsubscribe link | Required by CAN-SPAM, GDPR for bulk mail | High |
| Purchased/scraped lists | High bounce rates destroy sender reputation | Very high |
| No SPF/DKIM/DMARC | Fails authentication checks | Very high |
How to write emails that avoid spam filters
- Authenticate your domain. Set up SPF, DKIM, and DMARC records. This is the single most important thing you can do for deliverability. Google's email sender guidelines explain the requirements.
- Warm up new domains gradually. Don't send 1,000 emails on day one. Start with 20–30 per day and increase over weeks. Most cold email tools like Woodpecker and Lemlist include built-in warmup features.
- Write like a human. Cold outreach that reads like a personal message doesn't trigger filters.
- Keep formatting minimal. Plain text or simple HTML. No heavy images, colored fonts, or complex templates.
- One clear CTA. Don't stuff multiple links. One link per email is safest.
- Clean your list regularly. Remove bounces, unsubscribes, and inactive addresses.
- Use a real reply-to address. Noreply addresses hurt engagement metrics.
- Test before sending. Use our spam word checker and subject line tester to catch issues before they reach inboxes.
Safe alternatives for common spam words
| Instead of | Try |
|---|---|
| Free | No cost, complimentary, on the house |
| Act now | When you're ready, at your convenience |
| Buy now | Get started, check it out |
| Guaranteed | Backed by, proven by, trusted by |
| Click here | [Descriptive link text] |
| Dear friend | [Recipient's actual name] |
| Limited time offer | Available this month, enrollment closing [date] |
| No obligation | Try it and see, explore |
| Incredible deal | [Specific value proposition] |
| Don't miss out | Here's what's coming, thought you'd want to know |
Which email is more likely to hit spam filters?
Right. That email combines multiple spam words (FREE, ACT NOW, GUARANTEED), ALL CAPS, and excessive punctuation. Any one of those is a yellow flag, all together is a guaranteed spam folder.
The email with "FREE!!! ACT NOW to claim your GUARANTEED discount!!!" combines multiple spam triggers: trigger words, ALL CAPS, and excessive punctuation. That combination almost guarantees a spam folder landing.
Outreach emails that land in the inbox
MentionAgent sends personalized, human-sounding outreach emails on your behalf, no spam words, no templates, just real conversations that get replies.
Start Getting Mentioned For $99/moFrequently asked questions
Do spam trigger words automatically send emails to spam?
No. Modern spam filters use hundreds of signals including sender reputation, engagement history, authentication (SPF/DKIM/DMARC), and content patterns. A single spam word won't tank your email, but multiple triggers combined with poor sender reputation will.
What triggers spam filters the most?
Sender reputation is the biggest factor. After that: failed authentication, high complaint rates, low engagement, sending to purchased lists, and content patterns like excessive caps, too many links, or image-heavy emails.
Can I use the word "free" in emails?
Yes, in moderation. Using "free" once in context (like "free trial" or "free guide") is fine with a healthy sender reputation. Problems arise when you overuse it, combine it with other triggers, or put it in ALL CAPS.
How do I check if my email will go to spam?
Use our free spam word checker to scan for trigger words. Also check sender reputation with Google Postmaster Tools, verify SPF/DKIM/DMARC records, and send test emails to seed accounts.