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500+ Spam Words that Could Send Your Mail List into Spam

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23% of spam complaints are caused by email content according to AccuWeb research. Every fourth message is intercepted by spam filters, and thus, is not read by recipients, killing your reputation because of the spam words included.

No wonder, email deliverability is based on domain reputation, email content, and content relevance. This way, the words you use directly affect your mailing results. So, let’s consider how to get rid of spam words to reduce spam complaints and increase the deliverability of your emails in your next email campaigns.

What are Spam words?

It is important for mail services (Gmail, Outlook, etc.) to deprive their users of receiving spam. To protect them, they have created spam filters – special algorithms that analyze emails and decide whether it is spam or not.

In the email marketing crowd, these words and phrases are called stop words.

Spam or Stop words are words that should be avoided when sending emails, otherwise, your emails will end up in spam and the sender’s reputation will be suspended by the spam filters.
Spam filters may check a great variety of emails every day. They store the data on which words and phrases spammers use most often in their mailings. When the spam filter detects these words in the mailing list, it automatically marks the message as spam.

Even a trusted sender may get into spam if uses too many stop words without being aware of them to be such. These words & phrases look harmless enough but can play a bad joke on the deliverability of your mailing list and spoil your reputation.

The list of Spam words to avoid in emails

Here’s the list of the most common words you may come across when preparing mailing in alphabetical order for your convenience

G – H I – J L – M
N – O P – Q R – S
T – U V – W X – Y – Z


A – B

Accept credit cards Benefits
Access now Best price
Access for free Best offer
Advertising Bonus
Affordable Boss
Act Now Brand new
All-new Bulk email
Amazed Buy
Amazing Buy now
Amazing offer Buy direct
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C – D

Call free Deal
Call me Direct marketing
Call now Discount
Cancellation required Do it now
Cash Do it today
Cash out Don’t delete
Cash bonus Double your
Click Double your cash
Click below  
Click here  
Click to get  
Compare rates  
Compete for your business  


E – F

Earn Freelance
Earn $ Free
Earn extra cash Free access
Earn money Free bonus
Earn monthly Fantastic offer
Earn from home Fast cash
Email extractor For just $xxx
Email harvest For Only
Email marketing For you
Exclusive deal Free quote
Expire Free sample
  Free trial
  Free website


G – H

Get Hello
Get it now Here
Get out of debt Hidden
Get paid Hidden charges
Get started now Hidden fees
Gift certificate High score
Give it away Home
Giving away Home based
Guarantee Home based business
Guaranteed Huge discount
  Hurry up


I – J

Important information Join millions
Income Join us
Income from home Junk
Increase sales  
Increase traffic  
Instant earnings  
Instant income  
Internet market  
Internet marketing  


L – M

Leave Make $
Legal Make money
Life Marketing
Life Insurance Marketing solutions
Lifetime Mass email
Lifetime access Million,
Limited number Money
Limited offer Money back
Limited supply Money making
Lowest price Month trial offer
Lowest rate  


N – O

New, Offshore
Name brand Offer
Never Offer expires
Never before Once in lifetime
New customers only Online job
No investment Online income
No hidden сosts Online marketing
No hidden fees Online pharmacy
No obligation Only
No cost Opt in
No credit check Order
Not scam Order now
Not spam Order shipped by
Now Order status
Now only Order today
No payment required  
No purchase necessary  
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P – Q

Per day (week, month) Quote
Pennies a day  
Price protection  
Promise you  
Pure profits  


R – S

Rates Success
Real thing Special offer
Refinance home Sale
Refund Sample
Removal Satisfaction
Request now Satisfaction guaranteed
Request today Save $
Risk-free Save money
Round the world Save money
  Save now
  Subscribe now
  Subscribe for free


T – U

Thousand, Urgent
Take action Unlimited
Take action now Unsecured credit
Terms and conditions Unsecured debt
The best rates Unsubscribe
This isn’t junk Urgent
This isn’t spam US dollars
This won’t last  
Time limited  


V – W

Viagra Work from home
Vicodin Warranty expired
VIP We hate spam
Visit our website Win


X – Y – Z

Xanax You are a winner! Zero chance
  You have been chosen Zero percent
  Your chance Zero risk
  Your income  
  Your status  


Numerals & Symbols you should avoid in your mailings

0% 100% 100% satisfied
0% risk 100% more 4U
777 #1 50% off
99% $$$  
99.9% 100% free  
50% discount 777  

Top Tips on How to Avoid Spam Filters

Here’s a quick list for you to double-check your email content for spam words & other violations while preparing your next campaign:

  • Don’t include large attachments in your email campaign messages.
  • Do not write the entire text in capital letters and use standard fonts.
  • Don’t be too wordy or watery.
  • Do not use many exclamation marks and other symbols in a row.
  • Write readable text.
  • Forget about the red, bold, highlighted text, underlines, blank lines and words with spaces, and repetitions.
  • Personalize your email headers & email subject lines, and make sure your personalization tags work properly.
  • Don’t use excessive HTML formatting.
  • Verify your emails to improve deliverability and keep your sender reputation safe.
  • Don’t get encrypted. Please include the real name of the company and the valid email of the sender.
  • Check the relevance of the database. By sending emails to non-existent email addresses, the risk of getting into spam increases.
  • Check your domain’s reputation before the email campaign launch.
  • Check out your authentication settings: whether SPF & DKIM are registered for the domain.
  • Set up & support DMARC technology that specifies what to do with a message that has not passed SPF & checks of DKIM.
  • Do not neglect the individual settings for spam filters as users may manually set spam filters in their mailboxes.
  • Use professional email marketing software to avoid troubles.


Working on improving your mailing content to avoid spam filters is a pain. It becomes more difficult because spam filters are improving based on readers’ behavioral patterns analysis and other complex algorithms. So, to formulate your proposals in such a way, that to guarantee deliverability to the recipients, study spam filters carefully, sort out your words, check the content to avoid unnecessary risk, etc.

So, check out your e-mail newsletters for stop words regularly and especially carefully in headers (subject lines). These simple tips will help to achieve a positive result.

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Written by: Ira Byvalkevich