Posted on 19 Apr 2019

500 spam trigger words you should never use in your subject line

When it comes to writing a compelling subject line, you start to wonder what’s the appropriate words to use so that your email stands out in your contact’s inbox. You look for a sentence that should neither be too short nor too long, yet grabs readers attention. But this is not the entire case! There’s something even bigger that really impacts your email performance: “spam trigger words”.

Spam traps and filters are becoming smarter and stricter by the day, so much that at times, one word can increase the chances of being filtered and buried in the spam box.

To optimize your email content for spam compliance, we’ve provided a list of 500 words and phrases you should avoid using in your subject lines.

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Lowest rate
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Quote
Mortgage
Lower your mortgage rate
Hidden fees
Buy direct
Talks about hidden charges
The best rates
Strong buy
Buy
Lowest insurance rates
Refinance
Refinance home

Money

Earn
Earn $
Earn per week
Expect to earn
Potential earnings
Earn money
Instant earnings
Earn monthly
Earn from home
Earn per month
Fast cash
Cash out
Cash bonus
Extra cash
Earn extra cash
Subject to cash
Extra income
Million dollars
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Credit card
Wants credit card
Accept credit card
Credit card check
Casino
Debt
Double your income
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Money
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Increase sales
Increase your sales
Cards accepted
Check
Check or money order
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Make money
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Credit
Only $
Get out of debt
Pennies a day
Unsecured credit
Your income
Additional income
Eliminate bad credit
Consolidate your debt
Profits
Calling creditors
Cents on the dollar

Business

Investment
Requires initial investment
Investment decision
Avoid bankruptcy
Stock disclaimer statement
Boss
Be your own boss
Stock alert
Hidden assets
Online biz opportunity
CNo selling
Name brand
Explode your business
Compete for your business
Stock pick(s)
New customers only

Ecommerce

Order shipped by
Confidentially on all orders
Shopper
Order status
Shopping spree

Email

Mass email
Auto email removal
Dear (email/friend/somebody)
Direct email
Bulk email
Email harvest
Email extractor
Extract email
Stop emailing me
Mail in order form
Priority mail
One time mailing
Claims to be in accordance with some spam law
Not spam
We hate spam
This isn’t spam
Lose weight spam
Sent in compliance
Not junk
Message
Message contains disclaimer
Junk
This isn’t junk
Undisclosed recipient

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Email marketing
Internet marketing
Multi-level marketing
Online marketing
Marketing solutions
Direct marketing
Ad
Search engine listings
Search engine(s)
Increase traffic
Tells you it’s an ad

Internet

More internet traffic
Internet market
Online degree
Web traffic
Online pharmacy
Apply online
Compare online
Online job

Offer

Amazing offer
Best offer
Bargain
Best bargain
Fantastic offer
Great deal
Serious offer
Special offer
Credit card offers
Deal
Discount
50% off
Giving away
Prize
Sale
Stuff on sale
Best price
Special for you
Special deal
Special discount
Limited offer
Lifetime deal
Huge discount
Vacation offers
Exclusive deal
They’re just giving it away
Cannot be combined with any other offer
Month trial offer
Special promotion
Talks about prizes
Long distance phone offer
Offer
Great offer
Offer expires
Give it away
Fantastic deal
Incredible deal
Give it away
Give (it) away
Claim your discount
Free gifts
100% free
Free money
Free access
Free cell phone
Free consultation
Free installation
Free offer
Free DVD
Free Macbook
Free iPhone
Free instant
Free preview
Free
F r e e
For free
Free priority mail
Free grant money
Free leads
Free quote
Free hosting
Free membership
Free sample
Free bonus
Free information
Subscribe for free
Affordable deal
Call free

Number

Million
100%
100% satisfied
#1
Zero chance
Zero risk
Number one
Number 1
For only
Serious only
Now only
Limited
Only
Unlimited
One time
Limited amount
Limited number
Once in a lifetime
Thousands
Join millions
Join millions of Americans

Medecine

Viagra
Fast Viagra delivery
Valium
Xanax
Cures
Vicodin

Health

Weight
Weight loss
Lose weight
Human growth hormone
Stop snoring
Cures baldness
Cell phone cancer scam
Safeguard notice
Life
Removes wrinkles

Time

Time limited
Lifetime
Lifetime access
Per month
Per day
Limited time
Limited time offer
Limited time only
Per week
Presently
This won’t last
Claims to be legal
In accordance with laws
Legal notice
Terms
Obligation
Terms and conditions
Easy terms
Reserves the right

Miscellaneous

Hello
Instant
Luxury
Please
Promise
Score
Success
While supplies last
All new
As seen on
Bill 1618
Cable converter
Chance
Home based
Life insurance
Nigerian
Pre-approved
Rolex
Score with babes
Social security number
Won
Avoid
Certified
Clearance
Congratulations
Expire
Great
Lose
Name
Open
Satisfaction
Serious
Supplies
Traffic
Win
Being a member
Brand new pager
Here
Home employment
Maintained
Round the world
Satisfaction guaranteed
Solution
Unsolicited
Wife
Work from home
Amazed
Cheap
Collect
Fantastic
Friend
Guarantee
Guaranteed
Problem
Trial
Winner
4U
Acceptance
Amazing
Collect child support
Hidden
Home based business
Information you requested
Laser printer
Medium
Opportunity
Performance
Produced and sent out
Removal
S 1618
Stop
We honor all
Access
Addresses on CD
Amazing stuff
Diagnostics
Drastically reduced
Form
Leave
Meet singles
Outstanding values
Phone
Print from signature
Removal instructions
Reverses
Section 301
The following form
University diplomas
You are a winner
Accordingly
Beverage
For you
Copy accurately
Dig up dirt on friends
For instant access
Gift certificate
If only it were that easy
Insurance
It’s effective
Member
Miracle
One hundred percent guaranteed
Passwords
Print out and fax
Real thing
Reverses aging
See for yourself
Stainless steel
Teen
Weekend getaway
While you sleep
You have been selected
Big bucks
Buying judgements
Can’t live without
Copy DVD’s
Dormant
Get
Home
Important information regarding
Luxury car
Member stuff
MLM
New domain extensions
Offshore
Promise you
Sample
Supplies are limited
Vacation
Winning
All natural
Be amazed
Be surprised
Beneficiary
Call me
Important notification
Info you requested
Increase your chances
Meet girls
Meet women
Meet me
Limited supply
Reverses aging
Stop calling me
You have been chosen
Your chance
Your status
Help
High-score
Celebrity
Risk-free
Extra

Negative statement

Don’t delete
Don’t hesitate
Claims not be selling anything
This isn’t a scam
Will not believe your eyes
Not intended
Not-scam
No obligation
No-obligation
Never
No claim forms
No gimmick
No strings attached
No hidden
No middleman
No disappointment
No age restrictions
No experience
No inventory
No questions asked
No catch
No selling
No-selling
No investment required
No medical exams
No hidden fees
No interests
No purchase necessary
No credit check/experience
At no cost
No cost
No hidden costs
No fees

Questions

  • What are you waiting for?
  • What’s keeping you?
  • Have you been turned down?
  • Who really wins?
  • Why pay more?

Below are a few suggestions to help you optimize your email messages on your campaigns or automations:

  1. Make your subject lines short, less than 7 words.
  2. Don't use one-word subject lines.
  3. Do not use all caps.
  4. Avoid special characters as well as “?,!,#” whenever you can.
  5. Personalize subject lines by using shortcodes, AKA merge tags. Check this article for more details.
  6. A/B test your subject lines. 
  7. Insert an emoji to have your emails standout.
  8. Gmail apps only: use email markup to add actionable items within your email subject line.
  9. Use synonyms to words like "complementary"instead of "free".
  10. Don't add "RE:" to subject lines if it's not a reply.


A great subject line should be part of your email marketing strategy. It can impact your open rate and contribute to the success or failure of your email campaign. The most critical part when writing a subject line is to highlight the benefit, make it relevant, and avoid using spam trigger words that might affect your deliverability. 

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