Your subject line is a single word away from the spam folder. Filters at Gmail, Yahoo, Outlook and every serious ISP still scan every message for a growing list of trigger words across all major providers. If yours contains too many, or even one particularly toxic one, your open rate collapses before a human ever sees the send.
This is the most complete spam words list we could build for 2026: 500+ email spam trigger words organized in 12 categories, each labeled with a Risk Level and a Safer Alternative you can paste directly into your next campaign. It is written for senders who need results, not lecture.
What Are Spam Trigger Words?
Spam trigger words are words and phrases that spam filters have historically associated with unwanted commercial email, scams, phishing, malware distribution, and low-quality promotional content. When a filter sees them, it adds points to your message’s spam score. Enough points, and your message is quarantined, folded to spam, or rejected outright.
Trigger words alone rarely doom a message. In 2026, spam filters combine content signals with sender reputation, authentication, engagement history, list quality, and formatting. But high-density trigger words remain a fast, cheap signal every filter still uses. A subject line reading “100% FREE CASH PRIZE ACT NOW!!!” is spam by any modern definition and will be treated as such regardless of who sent it.
How Spam Filters Actually Score Your Emails in 2026
Spam filters no longer rely on simple keyword blocklists. Modern filters run several layers in parallel and combine their scores to decide inbox placement.
Bayesian and machine-learning classifiers
Gmail, Yahoo, and Outlook.com use trained ML classifiers that learn from billions of spam and ham labels every day. These models detect trigger words in context, so “free shipping on your order” is treated very differently from “GET FREE MONEY NOW.” Density, capitalization, punctuation, and co-occurring words all matter.
SpamAssassin-style rule scoring
SpamAssassin, still widely deployed in corporate mail servers, assigns numeric scores per rule. Trigger words like FREE (in caps) add +0.5 to +3 points. Total score above 5 typically triggers spam classification. You can test your own copy against SpamAssassin via Mail-Tester.
Gmail, Yahoo and Outlook signals
The big three inbox providers each add their own signals on top of content scoring: user complaint rate (must stay below 0.3 percent at Gmail), historical engagement of the recipient with your domain, domain reputation, list churn rate, and one-click unsubscribe (RFC 8058) support.
Impact of the February 2024 bulk sender rules
Gmail and Yahoo now require bulk senders (5,000+ messages per day to their users) to authenticate every message with SPF and DKIM, publish a DMARC record, offer one-click unsubscribe, and keep spam complaint rate below 0.3 percent. Trigger words that were tolerated before 2024 now push borderline senders over the threshold. Words are amplified by weak infrastructure.
500+ Spam Words Organized by Category
Each table below shows the trigger word, its Risk Level (High guaranteed spam score, Medium combines badly with other triggers, Low mildly penalized), and a Safer Alternative you can drop in. Words are grouped by intent, not alphabetically, so you can see the family patterns filters look for.
1. Money and Financial (75 words)
Anything that promises money, discusses credit or debt, or advertises financial products is scrutinized heavily. Filters were trained on decades of loan scams, credit-repair fraud, and get-rich schemes.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| $$$, $$$$, %%%, &&& | High | Remove, use plain text |
| €€€, £££ | High | Remove, use plain text |
| 100% free, F r e e, F-r-e-e | High | Complimentary, at no cost |
| Free money, Free cash | High | Gift, bonus credit |
| Cash, Cash bonus, Cash out | Medium | Refund, payout, credit |
| Cashcashcash, F.R.E.E., Freefreefree | High | Remove repetition entirely |
| Earn cash, Earn extra income | High | Grow revenue, add income stream |
| Earn from home, Earn per week/month/year | High | Work remotely, weekly payout |
| Fast cash, Instant income, Extra cash | High | Fast payout, additional revenue |
| Double your income, Double your cash | High | Grow revenue meaningfully |
| Financial freedom, Financial peace | Medium | Financial stability |
| Bad credit, Bankruptcy, Avoid bankruptcy | High | Rebuild credit history |
| Consolidate debt, Get out of debt | Medium | Restructure balances |
| Credit, Credit card offers, Credit or debit | Medium | Card, payment method |
| Loans, Mortgage, Mortgage rates | Medium | Financing, home financing |
| Refinance, Compare rates, Subject to credit | Medium | Rate review, comparison |
| Bank, Billing, Billing address | Low | Use in context only |
| Billion, Billion dollars, Billionaire | High | Significant, large-scale |
| Dollars, US Dollars, Cents on the dollar | Medium | Currency, USD, price |
| Money-back guarantee, Full refund | Medium | 30-day return policy |
| Save $, Save big money, For just $ | High | Reduced pricing, priced from |
| Only $, Cost, Costs, Price | Low | Priced at, from |
| Discount, Claim your discount | Low | Special pricing (used sparingly) |
| Bargain, Best bargain, Best price | Medium | Value pricing, competitive rate |
| Best rates, Best deal, Amazing deal | Medium | Rate you qualify for |
| Free access, Free consultation, Free gift | Medium | Complimentary session |
| Free hosting, Free info, Free investment | Medium | Included, at no charge |
| Free membership, Free preview, Free quote | Medium | Complimentary access, sample |
| Free trial, Free hosting, Free samples | Low | Trial (used with proof) |
| Increase revenue, Increase sales, Increase traffic | Medium | Grow performance metrics |
| Investment, Investment advice, Free investment | Medium | Portfolio strategy |
| Insurance, Compare insurance | Low | Coverage, policy comparison |
| Quote, Free quote, Get a quote | Low | Estimate, price check |
| Casino, Casino bonus | High | Remove (gambling category) |
| Profits, Pure profit, Big profit | High | Margin, revenue |
| Make money, Make $, Guaranteed income | High | Generate revenue, add income |
| Price protection, Guaranteed deposit | Medium | Price lock, secured deposit |
2. Get Rich Quick and MLM (40 words)
Multi-level-marketing language and pyramid-scheme phrasing are among the oldest patterns in spam-filter training data. Any “work from home + fast money” combination almost guarantees spam classification.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| Be your own boss, Own boss | High | Start your own business |
| Become a millionaire, Become a member | High | Build long-term wealth |
| Big bucks, Big pockets | High | Significant earnings |
| Business opportunity | High | Business proposal |
| Compensation plan, Commission | Medium | Payment structure |
| Direct email marketing, Direct marketing | High | Email outreach |
| Downline, Upline | High | Referrals, network |
| Explode your business, Explode your traffic | High | Grow steadily, scale |
| Fast money, Fast cash, Quick money | High | Fast payout |
| Financial peace, Financial freedom | Medium | Financial stability |
| Get paid, Get paid every day | Medium | Receive payment |
| Home based, Home business, Home employment | Medium | Remote role, work from home |
| Homeworking, Work from home | Low | Remote position |
| Instant earnings, Instant income | High | Same-day payout |
| Make money fast, Make cash fast | High | Start earning quickly |
| MLM, Multi-level marketing | High | Referral program |
| Online biz opportunity, Online business | Medium | E-commerce venture |
| Opportunity, Ground floor opportunity | Medium | Early-stage role |
| Passive income, Residual income | High | Recurring revenue |
| Pennies a day, Pennies on the dollar | High | Low daily cost |
| Potential earnings, Expected earnings | Medium | Projected revenue |
| Retire, Retire now, Retire early | Medium | Financial independence |
| Sales team, Downline sales team | Low | Sales organization |
| Small business, While you sleep | High | Business, recurring revenue |
| Waste no time, Take control | High | Start today, take charge |
| Work at home, Work from home | Low | Remote work |
3. Free and Discounts (40 words)
“Free” is not automatically toxic, but stacking free-related phrases with promotional urgency lights up filters immediately. Use these sparingly and in natural context.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| 50% off, 75% off, 90% off | Medium | Half price, deep discount |
| 100% off, 100% free | High | Completely free (used with proof) |
| All-inclusive, All new | Low | Full package |
| As seen on, As seen on Oprah | High | Featured by (with proof) |
| Auto email removal | High | Unsubscribe link |
| Buy direct, Buy now, Buy today | Medium | Shop now (used sparingly) |
| Cheap, Cheap deals, Cheap discounts | High | Affordable, value pricing |
| Clearance, Clearance sale | Low | End-of-season pricing |
| Direct email, Direct marketing | Medium | Personal outreach |
| Discount cheap, Drastically reduced | High | Significantly lowered |
| Free!, Free access, Free bonus | Medium | Complimentary access |
| Free CD, Free DVD, Free chance | High | Included resource |
| Free complete, Free consultation | Medium | Complimentary session |
| Free grant money, Free instant | High | Grant funding, immediate |
| Free installation, Free leads | Medium | Included setup, qualified leads |
| Free offer, Free samples, Free shipping | Low | Included offer, sample, shipping |
| Free website, Free trial | Low | No-cost trial (with proof) |
| Half off, Lowest price ever | Medium | 50% off, market low |
| Incredible price, Lowest price | Medium | Best available price |
| Not junk, Notspam | High | Remove, sounds like spam |
| Special promotion, Special offer | Low | Limited offer (with detail) |
| Blowout, Bureau of, Copy accurately | Medium | Major sale, standardized copy |
4. Urgency and Scarcity (50 words)
Manufactured urgency is one of the strongest spam signals. Filters see “Act now” as suspicious not because urgency is bad, but because scammers overuse it. Keep urgency real and specific.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| Access now, Get instant access, For instant access | High | Start now, sign in |
| Act fast, Act now, Act now! | High | Respond by [date] |
| Act immediately, Action required | High | Please review by [date] |
| Apply here, Apply now, Apply online | Medium | Start your application |
| Before it’s too late, Deadline | High | Registration closes [date] |
| Buy now, Buy today, Buy direct | Medium | Complete your order |
| Cancel now, Cancel at any time | Medium | Cancel anytime (as fine print) |
| Cannot be combined, Cannot live without | Medium | Combine with other offers, essential |
| Cannot miss, Claim now | High | Worth reviewing, retrieve |
| Click here, Click now, Click me | High | [Descriptive link text] |
| Click to remove, Click to unsubscribe | Low | Unsubscribe (link only) |
| Contact us immediately, Do it now | High | Reach out today |
| Days only, 24 hours only | Medium | Ends [specific date] |
| Deal ending, Ending soon | Medium | Ends [date] at [time] |
| Don’t delete, Don’t hesitate | High | Save this for later |
| Don’t waste time, Do it today | High | Recommended timing |
| Exclusive deal, Exclusive access | Medium | Member benefit |
| Expires today, Expiration date | Medium | Ends [specific date] |
| Final call, Final notice | High | Last reminder, closing soon |
| Friday before holiday, Get it away | High | Pre-holiday, act soon |
| Get now, Get started, Get started now | Low | Begin, start today |
| Great offer, Hot deal | Medium | Notable pricing |
| Hurry, Hurry up, Rush | Medium | Time-limited |
| Immediately, Instantly, Instant | Medium | Right away, on the spot |
| Info you requested, Information requested | High | Requested details, your account |
| Last chance, Last minute | Medium | Closing tonight |
| Limited time, Limited time offer | Medium | Until [date] |
| New customers only, Now only, Only | Medium | Available to new members |
| Offer expires, Once in lifetime, Once in a lifetime | High | Ends [date], rare occasion |
| Order now, Order today, Purchase now | Medium | Reserve, complete your order |
| Please read, Please respond | Low | Quick review requested |
| Sign up free, Sign up free today | Medium | Create your free account |
| Supplies are limited, While supplies last | Medium | Limited availability |
| Take action, Take action now | High | Review your options |
| This won’t last, Time limited | High | Available through [date] |
| Today, Top urgent, Trial | Low | Today only (with reason) |
| What are you waiting for, You are a winner | High | Remove, pressure phrasing |
5. Guarantees and Promises (35 words)
Filters treat guarantees skeptically because scammers rely on them. Real guarantees should be specific (30 days, money-back, terms link), not floating claims.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| 100% guaranteed, 100% satisfied | High | 30-day satisfaction guarantee |
| Absolutely free, Absolutely no cost | Medium | No cost, no obligation |
| Assurance, Backed by guarantee | Medium | Backed by [specific policy] |
| Beware, Bureau of | High | Please note, official body |
| Certified, Certified organic | Low | Named certification |
| Congratulations | High | Well done, nice work |
| Cures, Cures baldness | High | Improves, treatment for |
| Guaranteed, Guaranteed results | Medium | Backed by our policy |
| Guaranteed deposit, Guaranteed income | High | Secured deposit, projected income |
| Guaranteed winner, Instant winner | High | Prize eligible, drawing entrant |
| Increase sales, Increase your sales | Medium | Grow your revenue |
| Incredible deal, Job alert | Medium | Notable offer, new job posting |
| Insurance, Life insurance | Low | Coverage, policy |
| Lifetime, Lifetime deal, Lifetime access | Medium | Long-term access |
| Mail in order form, Money back | Medium | Return form, refund policy |
| Money-back guarantee, No age restrictions | Low | 30-day refund, open to all |
| No catch, No claim forms | High | Simple process |
| No credit check, No fees | High | No credit review required |
| No gimmick, No hidden costs | High | Transparent pricing |
| No hidden fees, No investment | Medium | All-in pricing, no capital needed |
| No obligation, No purchase necessary | Medium | Optional, no purchase required |
| No strings attached, No questions asked | High | Straightforward, without conditions |
| Promise, Promised, Risk-free | High | Committed to, low-risk |
| Satisfaction guaranteed, Save up to | Medium | 30-day satisfaction, up to X off |
6. Hype and Exaggeration (45 words)
Superlatives without evidence are classic spam markers. Filters expect real senders to substantiate claims. Empty hype adjectives add points to every message.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| Amazing, Amazing offer, Amazing stuff | High | Notable, worth reviewing |
| Astonishing, Be amazed, Be surprised | High | Learn something new |
| Beautiful, Best, Best deal | Low | Recommended, top pick |
| Best offer, Best price, Best rates | Medium | Rate you qualify for |
| Big pockets, Blowout | Medium | Major sale event |
| Cool, Deal, Delivered | Low | Interesting, offer, shipped |
| Direct email, Dormant, Drastically | Medium | Personal message, inactive, significantly |
| Explode your business, Explode your traffic | High | Grow steadily, scale visits |
| Extraordinary, Fantastic, Fantastic deal | Medium | Rare, remarkable, strong offer |
| Fantastic offer, Fastest, Freedom | Medium | Strong offer, top speed, independence |
| Groundbreaking, Ground floor | Medium | Novel, early-stage |
| Highest, Huge, Impressive | Low | Top, sizable, notable |
| Incredible, Join millions, Millions | High | Highly rated, thousands of users |
| Never before, No inventory, No investment | Medium | First time, drop-ship, self-funded |
| Once in lifetime, Outstanding | High | Rare occasion, excellent |
| Perfect, Phenomenal, Powerful | Low | Well-suited, high-performance |
| Pure, Remarkable, Revolutionary | Medium | Refined, notable, novel approach |
| Sensational, Serious, Spectacular | Medium | Significant, important, impressive |
| Superb, Terrific, Thousands | Low | Excellent, thousands of members |
| Ultimate, Unbeatable, Unbelievable | High | Comprehensive, hard to match |
| Unlimited, Wonderful, You will not believe | Medium | Unrestricted, worth checking |
7. Medical and Pharma (40 words)
Pharmaceutical spam is one of the oldest, largest, and most heavily scored spam categories. Any unlicensed medical claim will be treated as spam or phishing by default.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| 100% natural, All natural | Medium | Naturally derived |
| Anti-aging, As seen on Oprah | High | Skincare formulated for, featured on |
| Baldness cure, Cure baldness, Hair growth | High | Hair thinning treatment |
| Boost immune system, Boost energy | Medium | Support immune health |
| Cancer cure, Cure diabetes, Cure for | High | Treatment for, therapy that |
| Cellulite, Cheap meds, Cialis | High | Skin firming, prescription savings, medication |
| Clinical trial, Diet, Diet pill | Medium | Study participants, nutrition plan, supplement |
| Doctor recommended, Double blind study | Medium | Physician-approved, peer-reviewed study |
| Eliminate wrinkles, Enhance sexual | High | Reduce fine lines, wellness support |
| Erectile, Impotence | High | Men’s health, wellness |
| Fat burner, Fat loss, Fast weight loss | High | Metabolic support, weight management |
| Get slim, Slim down, Overweight | Medium | Body composition support |
| Guaranteed weight loss, Herbal | High | Weight management program, plant-based |
| Hormone, Testosterone, Vitamins | Medium | Endocrine support, wellness |
| Lose weight fast, Lose inches, Lose pounds | High | Sustainable weight change |
| Medical breakthrough, Miracle cure | High | Clinical advancement |
| Natural remedy, No prescription needed | High | Natural approach, over-the-counter |
| Nurse, Nurses recommend | Low | Clinician-approved |
| Online pharmacy, Prescription drugs | High | Licensed pharmacy, medications |
| Over the counter, Pain relief | Low | OTC, discomfort relief |
| Reverse aging, Youthful skin | High | Skincare regimen |
| Safe and effective, Scientifically proven | Medium | Clinically studied |
| Secret formula, Snoring, Stop snoring | Medium | Proprietary blend, sleep quality |
| Ultimate weight loss, Valium, Viagra | High | Weight program, medication |
| Vicodin, Xanax, Prescription savings | High | Medication, prescription discount card |
8. Adult, Dating and Gambling (35 words)
These categories are hard-blocked by default at most workplaces. Any occurrence of these terms will typically move you straight to spam or reject.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| Adult, Adult content, Adults only | High | Mature audience only (with age gate) |
| Bedroom, Bet, Bet now | High | Home decor, wager, place your wager |
| Big win, Blackjack, Booze | High | Winnings, card game, alcohol |
| Casino, Casino bonus, Online casino | High | Gaming venue, entertainment credit |
| Cash out now, Cheating | High | Withdraw, dishonesty |
| Click to win, Dating | High | Enter to win, matchmaking |
| Free chips, Free spins | High | Complimentary credits |
| Gamble online, Online betting, Online gaming | High | Regulated gaming platform |
| Girls, Hookup, Horny | High | Remove, explicit |
| Hot deal, Hot singles | High | Featured offer, active members |
| Instant winnings, Jackpot | High | Winnings paid, top prize |
| Lingerie, Live dealer | High | Intimates apparel, live-stream tables |
| Lottery, Lottery winner, Lucky chance | High | Prize drawing, drawing winner |
| Meet singles, Naughty, Nude | High | Meet locals, playful, art figure |
| Poker, Poker tournament, Porn | High | Card game, tournament, remove |
| Risk-free bet, Sensual | High | Refunded stake, sophisticated |
| Sex, Sexy, Singles | High | Wellness, attractive design, members |
| Slots, Slots jackpot, Spin to win | High | Reel game, spin the wheel |
| Try for free, VIP offer | Medium | Trial available, premium members |
| Winner announced, Winning numbers, XXX | High | Drawing results, remove |
9. Prizes and Sweepstakes (30 words)
Prize-related language is a legacy scam pattern. Legitimate contests should specify entrant conditions, sponsor identity, and drawing dates. Bare “you won” language flags every time.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| Award, Cash prize | Medium | Recognition, prize package |
| Congratulations you have been selected | High | Your entry has been received |
| Contest, Enter our contest | Low | Contest (with rules link) |
| Draw, Random winner, Random draw | Medium | Drawing, selected at random |
| Enter to win, Entered | Low | Enter our giveaway |
| Free access, Free gift, Free info | Medium | Included access, gift, resource |
| Free offer, Free preview | Medium | Complimentary offer, preview access |
| Gift certificate, Voucher | Low | Gift card, credit |
| Giveaway, Guaranteed winner | Medium | Giveaway (with rules), entrant |
| Instant winner, You are a winner | High | You qualified for our drawing |
| Lifetime deal, Prize | Medium | Long-term access, reward |
| Reward, Selected, Sweeps | Medium | Membership perks, chosen, sweepstakes |
| Sweepstakes, The winner is | Low | Sweepstakes (with rules), winner announced |
| Unclaimed prize, Valuable gift | High | Prize pending, gift package |
| We have selected you, You have been selected | High | You qualify for, invitation for |
| You have won, You won | High | Congrats on your entry |
10. Clickbait and Manipulation (40 words)
Vague curiosity gaps and manipulation phrasing are heavily penalized. Filters were trained specifically on scammy “Dear friend” letters and clickbait patterns.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| Amazing story, Crazy story, Shocking | High | Case study, unusual result |
| As seen on, Attention | High | Featured on (with proof), FYI |
| Can’t believe, You will not believe your eyes | High | Notable, worth reading |
| Click below, Click here now, Click this link | High | [Descriptive link text] |
| Click me, Click to get, Compare online | High | Descriptive CTA, compare options |
| Confidentially, Costs so little | Medium | Confidential, affordable |
| Curious, Cures spamophobia | High | Interested, remove |
| Dear beneficiary, Dear friend, Dear sir | High | Hi [first name] |
| Do not delete, Do not respond | High | Save for reference, feedback welcome |
| Don’t miss, Enclosing | Medium | Worth reviewing, attached |
| Guess what, Have you heard | Medium | Quick update, news for you |
| Hidden, Hidden charges, Hidden secrets | High | Transparent pricing, insider tips |
| I hate spam, This isn’t spam, This isn’t junk | High | Remove, screams spam |
| If only, Important information | Medium | Ideally, quick note |
| Important notification, Info you requested | High | Account update, requested details |
| Interesting, Look, Long-lost friend | Low | Noteworthy, see, from an old contact |
| Lowest interest rate, Meet | Medium | Best available rate, connect with |
| Might not, Mind blown | Medium | May not, surprising |
| Missed, Must read, No purchase necessary | Low | You missed, recommended reading |
| One time only, Open now | Medium | Available once, view now |
| Please read, See for yourself | Low | Recommended read, try it |
| Serious cash, Serious offer, Startling | High | Notable revenue, genuine offer, surprising |
| Stunning, Solutions | Low | Impressive, options |
11. Deceptive and Phishing (35 words)
Phishing-style language is aggressively filtered because it costs users money and providers reputation. Even legitimate account emails should avoid this vocabulary or add strong context.
| Spam Word | Risk | Safer Alternative |
|---|---|---|
| Access your account, Log in now | Medium | Sign in to your dashboard |
| Account frozen, Account holder | High | Account paused, member |
| Account update, Update account, Update your info | Medium | Profile refresh, keep details current |
| Action needed, Action required | High | Please review by [date] |
| Activate now, Change password | Medium | Activate your account, reset password |
| Click to verify, Verify now, Verify identity | High | Confirm your identity in-app |
| Confirm now, Confirm your details, Please confirm | High | Please review your details |
| Confidential, Confidential information | Medium | Private, restricted access |
| Cyber attack, Data breach | High | Security incident, incident notice |
| Dear valued customer, Detected | High | Hi [first name], noticed |
| Download now, Fake, Fast approval | Medium | Download the report, replica, fast decision |
| Final notice, Final warning, Last warning | High | Reminder, closing soon |
| Fraud alert, Free antivirus | High | Suspicious activity notice, security tool |
| Government approved, Immediate action | High | Government-authorized, please act |
| Important update, Improve security | Medium | Product update, strengthen security |
| Login attempt, New login detected | Medium | Sign-in from [device] |
| Notification, Once in a lifetime | Low | Update, rare occasion |
| Password reset, Pay day | Low | Password reset link, payday |
| Payment details, Payment overdue, Payment received | Medium | Payment method, invoice past due |
| Phishing alert, Please respond | High | Security tip, quick reply appreciated |
| Secure payment, Security alert, Security breach | Medium | Secure checkout, security notice |
| Security update, Suspicious activity | Medium | Platform update, unusual sign-in |
| Unusual activity, We noticed, You must | Medium | We spotted, please review |
| Warning message, Urgent action | High | Important notice, priority item |
12. Symbols and Punctuation Traps (35 patterns)
Filters analyze formatting as much as words. Excessive punctuation, decorated fonts, and emoji stacks are heavily penalized because they mimic scammer aesthetics.
| Spam Pattern | Risk | Safer Alternative |
|---|---|---|
| !!!, !!!!!, Multiple exclamation marks | High | Single period, at most one ! |
| ???, ???!!, ??! | High | Single question mark |
| ALL CAPS SUBJECT LINES | High | Sentence case |
| ………, …., ….. | Medium | Single ellipsis or period |
| ##1, #1, $$, $$$$ | High | Number one, top-rated |
| %%%, ***, ***FREE*** | High | Remove decorations |
| **AMAZING**, *NEW*, *ULTIMATE* | High | Plain text, no asterisks |
| [SPAM], [URGENT], (FREE), (LIMITED) | High | Remove brackets, use context |
| 100%%%, 1000%, 5-star | Medium | 100 percent, five-star rating |
| {SUBJECT}, {URGENT}, unrendered tokens | High | Test your merge tags first |
| Repeated emoji stacks (3+ of same emoji), fire, money-bag, rocket | High | At most one emoji, at end |
| Money-bag icons, pointing-hand stacks, five-star rows, gift icons, double warnings | High | Text only or single subtle icon |
| Currency emoji, warning emoji stacks | High | Plain text description |
| F.R.E.E., FRE.E., FR.EE, F/R/E/E | High | Complimentary (no filler chars) |
| F r e e, Y-o-u W-i-n, wide W ide spacing | High | Standard spacing |
| RE:, RE:RE:, FWD:FWD: fake reply chains | High | Compose fresh subject |
| Triple $$$ signs, TRIPLE $$$ SIGNS | High | Currency shown once, in body |
| Unicode Ⅰ Ⅱ Ⅲ substitute characters | High | Standard ASCII letters |
| Zero-width joiners, invisible characters | High | Clean UTF-8 only |
| Cyrillic-look letters (а, е, о substitution) | High | Standard Latin letters |
Before/After: Real Subject Lines Rewritten
The point of a spam words list is not to memorize words. It is to rewrite subject lines that convert without triggering filters. Here are 12 real subject lines with the same intent, rewritten to avoid triggers.
FREE!!! 50% OFF – Act Now Before It’s Too Late!!!
Your 50% discount ends Friday, [First name]
Congratulations! You Have Been Selected For A FREE Gift
A gift for our long-time subscribers
Make $$$ From Home – Guaranteed Income!!!
Remote income streams: how three of our members built theirs
Click Here NOW To Claim Your Cash Prize
Your drawing entry is confirmed, details inside
URGENT: Action Required On Your Account
A change on your account, please review
Lose 20 Pounds In 7 Days – 100% Guaranteed!
A 30-day program our nutritionists recommend
Amazing Business Opportunity – Be Your Own Boss!!!
The Q1 startup incubator applications close March 15
100% FREE TRIAL – No Credit Card Required, No Catch!
Try [Product] free for 14 days, no card needed
Dear Valued Customer, Your Account Has Been Compromised!
A sign-in from an unrecognized device
Final Notice: Payment Overdue – Pay Now Or Face Consequences
Your March invoice is past due, here’s the link
This Week Only: SAVE BIG On Everything!!!
This week only: 20% off in your favorite category
You Won’t Believe This Amazing Deal – Click Here!
The offer we ran last quarter is back for one week
Spam Word Risk Levels Explained
Every row in the tables above is tagged with one of three risk levels. Understanding them helps you decide what to remove and what to keep with context.
High A single occurrence noticeably raises your spam score across most filters. Two or three in the same message will typically move it to spam even with strong sender reputation. Remove these outright.
Medium Adds points in isolation but survives if the surrounding content is professional, the sender has strong reputation, and the message is well-authenticated. Use sparingly and in natural context.
Low Historically flagged but tolerated in normal business copy. Safe to use as long as the message is not otherwise loaded with medium and high-risk signals.
How to Test Your Emails Before Sending
Guessing whether your message will land in the inbox is a bad habit. Test every campaign before send. Four free tools give you 90 percent of what a paid inbox-placement service does.
Mail-Tester
Sends your email to a test address, runs it through SpamAssassin plus SPF/DKIM/DMARC checks, and returns a 0-10 score with a full breakdown. The single fastest way to test a campaign. Free for a limited number of daily tests.
MXToolbox Deliverability Test
Runs blocklist checks, DMARC/SPF/DKIM validation, and header analysis. Best for diagnosing whether your infrastructure (not just words) is the problem.
SpamAssassin (self-hosted)
Install locally or use the API version to score your subject and body against 1,000+ SpamAssassin rules. Best for developers who want to test at scale during CI.
GlockApps or Litmus Spam Testing
Paid tools that show inbox placement across Gmail, Outlook, Yahoo, and dozens of receivers. Worth the money for bulk senders (>50k contacts).
10 Rules to Stay Out of Spam in 2026
Removing spam words is table stakes. To sustainably reach the inbox in 2026, follow all ten.
5 Spam-Free Email Examples That Actually Convert
Filter rules teach you what to avoid. These examples show you what to send. Each of the five below is a real email pattern that reaches inbox at 90%+ despite selling, discounting, or asking for engagement. What separates them from spam is not what they leave out, it is what they do: honest subject, one clear ask, human sender, real context, no manufactured urgency.
Hi Alex,
Thanks for signing up. Your workspace is live and the trial runs through November 3.
The fastest way to see value in Loomly is to connect one channel and schedule one post. It takes about five minutes.
Connect your first channelCustomer onboarding, Loomly
- Named sender with real mailbox, not no-reply@
- Zero trigger words, one clear ask, timeline given as a date
- Personalization used naturally, not as gimmick
Hi Anna,
The Fjord Wool Crewneck in charcoal is still in your bag. We hold items for 48 hours before releasing them back to stock.
Free shipping applies at checkout. Sizing questions? Reply to this email and someone from the store will help.
Return to my bagCopenhagen, Denmark
- Real product name and detail, not a generic “cart” nudge
- Honest timeframe (48 hours), no manufactured scarcity
- Reply address is monitored, invites engagement
Good morning,
Three pricing changes worth studying this week. Notion quietly added a Business tier positioned above Plus but below Enterprise. Vercel simplified their bandwidth math after complaints. Figma is compressing seat pricing ahead of the Adobe deal closing.
Full teardown of each, including screenshots and the questions I would ask their PMs, in the post.
Read this week’s issuePricing Weekly, 12,400 subscribers
- Subject and preview deliver value before the click
- Real byline, real substance, zero promotional language
- List size disclosed in signature, signals confidence
You joined Roam sometime in 2023, back when we were rougher around the edges. This is a small thank-you.
Between now and Sunday November 12 at midnight PT, existing annual plans renew at 20% off. The discount applies automatically at checkout, no code needed.
If you already renewed this quarter, reply and we will apply the credit.
Renew with 20% off- Specific segment (2023 signups), not a mass blast
- Exact end date and timezone, no “act now” pressure
- Acknowledges edge cases (already renewed), invites reply
Hi there,
Looking at our list, you have not opened a Fathom email in about six months. That is fine, inboxes get busy. Before we take you off the main list, a quick honest update.
We shipped a rewritten dashboard, doubled sync speed, and launched a Starter plan at $12 per month for sites under 100k pageviews. If either of those unblocks you, we would love to have you back.
If not, no worries. You can stay quietly subscribed, or unsubscribe below in one click.
See what changedCo-founder, Fathom Analytics
- Acknowledges silence honestly, no guilt-tripping
- Names real product changes worth returning for
- Makes leaving easier than staying, protects reputation either way
FAQ
Will using one spam word send my email to spam?
Almost never. Modern filters score dozens of signals together. One high-risk word plus a good sender reputation and strong authentication will still land in the inbox. But two or three, or one combined with poor infrastructure, will push you over.
How many spam words is too many?
There is no fixed threshold. A useful rule of thumb: keep high-risk words at zero, medium-risk words at one or two per message, and low-risk words at a natural rate. Test with Mail-Tester and target a score of 9 or higher.
Do spam words in the subject line matter more than in the body?
Yes, significantly. Subject lines carry more weight in spam scoring because they are the highest-signal part of a message and the most abused by scammers. Prioritize cleaning the subject.
Does using “free” automatically flag my email as spam?
No. “Free shipping,” “free trial,” and “free consultation” are used by legitimate senders every day. What triggers filters is stacking, “100% FREE!!! Free gift! Free access! Free membership!” is spam. One natural use of “free” is fine.
Can emojis in subject lines trigger spam filters?
Multiple emojis can. One tasteful emoji, ideally at the end of the subject, is tolerated by Gmail and Outlook. Emoji stacks (three or more of the same emoji in a row) and money or gambling emojis are penalized heavily.
What is the safest subject-line length in 2026?
30 to 60 characters. Under 30 characters looks abrupt to filters and users. Over 60 gets truncated on mobile and reads as trying too hard. Aim for 40 to 50 for optimal open rates.
How do I know which spam filter is affecting me?
Send a test to addresses at Gmail, Yahoo, Outlook.com, and a corporate address behind Barracuda or Proofpoint. Compare inbox placement. Then run Mail-Tester to see the SpamAssassin breakdown for the failing receiver.
Do spam filters change frequently?
Yes. Gmail and Yahoo push updates monthly, and the Feb 2024 bulk sender rules were a major shift. Rules for corporate filters change quarterly or on incident. What worked six months ago may not work today.
Are transactional emails (receipts, password resets) subject to the same word list?
Yes, but with more forgiveness. Transactional senders benefit from strong recipient engagement (receipts are opened at 80 percent+), which offsets some word risk. Still, avoid the high-risk list.
Can I recover from being marked as spam repeatedly?
Yes, but it takes 2 to 12 weeks of clean sending with strong authentication, low complaint rate, high engagement, and no bounces. Read our Cold IP Recovery guide for the diagnostic playbook.
Last updated for the 2026 Gmail and Yahoo sender requirement changes. Spam filter behavior is a moving target, run your own tests, monitor Postmaster Tools, and revisit this list quarterly.
About the Author
Alaa · LinkedIn
Email infrastructure specialist with 8+ years of hands-on experience in SMTP, deliverability, and email verification. I’ve configured and troubleshot mail systems across Postfix, Exchange, and cloud relays, managed IP reputation and warmup campaigns, and built verification pipelines processing millions of addresses. My work spans DNS authentication (SPF, DKIM, DMARC, BIMI), bounce handling, blocklist monitoring, and compliance frameworks including CAN-SPAM and GDPR. I write every article on SMTPedia to give email professionals, developers, and marketers the accurate, RFC-grounded reference they need.
About SMTPedia
SMTPedia is an independent email industry reference covering SMTP, IMAP, POP3, email deliverability, marketing platforms, DNS authentication, and email verification. Every article is researched from official provider documentation, IETF RFCs, and industry best practices. Settings and configurations are verified quarterly.
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