Most ESPs have a pre-send filtering stage where the third category is flagged. Based on billions of emails sent through these filters ActiveCampaign has compiled 188 email spam words and phrases organized into four categories. Avoiding these words and phrases, especially in your email subject lines, will go a long way to improving your email deliverability and boost your email open rates.
Email Spam words that make exaggerated claims and promises
1. #1
2. 100% more
3. 100% free
4. 100% satisfied
5. Additional income
6. Be your own boss
7. Best price
8. Big bucks
9. Billion
10. Cash bonus
11. Cents on the dollar
12. Consolidate debt
13. Double your cash
14. Double your income
15. Earn extra cash
16. Earn money
17. Eliminate bad credit
18. Extra cash
19. Extra income
20. Expect to earn
21. Fast cash
22. Financial freedom
23. Free access
24. Free consultation
25. Free gift
26. Free hosting
27. Free info
28. Free investment
29. Free membership
30. Free money
31. Free preview
32. Free quote
33. Free trial
34. Full refund
35. Get out of debt
36. Get paid
37. Giveaway
38. Guaranteed
39. Increase sales
40. Increase traffic
41. Incredible deal
42. Lower rates
43. Lowest price
44. Make money
45. Million dollars
46. Miracle
47. Money back
48. Once in a lifetime
49. One time
50. Pennies a day
51. Potential earnings
52. Prize
53. Promise
54. Pure profit
55. Risk-free
56. Satisfaction guaranteed
57. Save big money
58. Save up to
59. Special promotion
Email Spam words that create unnecessary urgency and pressure
60. Act now
61. Apply now
62. Become a member
63. Call now
64. Click below
65. Click here
66. Get it now
67. Do it today
68. Don’t delete
69. Exclusive deal
70. Get started now
71. Important information regarding
72. Information you requested
73. Instant
74. Limited time
75. New customers only
76. Order now
77. Please read
78. See for yourself
79. Sign up free
80. Take action
81. This won’t last
82. Urgent
83. What are you waiting for?
84. While supplies last
85. Will not believe your eyes
86. Winner
87. Winning
88. You are a winner
89. You have been selected
Email Spam words that look like shady, spammy, or unethical behavior
90. Bulk email
91. Buy direct
92. Cancel at any time
93. Check or money order
94. Congratulations
95. Confidentiality
96. Cures
97. Dear friend
98. Direct email
99. Direct marketing
100. Hidden charges
101. Human growth hormone
102. Internet marketing
103. Lose weight
104. Mass email
105. Meet singles
106. Multi-level marketing
107. No catch
108. No cost
109. No credit check
110. No fees
111. No gimmick
112. No hidden costs
113. No hidden fees
114. No interest
115. No investment
116. No obligation
117. No purchase necessary
118. No questions asked
119. No strings attached
120. Not junk
121. Notspam
122. Obligation
123. Passwords
124. Requires initial investment
125. Social security number
126. This isn’t a scam
127. This isn’t junk
128. This isn’t spam
129. Undisclosed
130. Unsecured credit
131. Unsecured debt
132. Unsolicited
133. Valium
134. Viagra
135. Vicodin
136. We hate spam
137. Weight loss
138. Xanax
Email Spam words that are jargon or legalese (and everything else)
139. Accept credit cards
140. Ad
141. All new
142. As seen on
143. Bargain
144. Beneficiary
145. Billing
146. Bonus
147. Cards accepted
148. Cash
149. Certified
150. Cheap
151. Claims
152. Clearance
153. Compare rates
154. Credit card offers
155. Deal
156. Debt
157. Discount
158. Fantastic
159. In accordance with laws
160. Income
161. Investment
162. Join millions
163. Lifetime
164. Loans
165. Luxury
166. Marketing solution
167. Message contains
168. Mortgage rates
169. Name brand
170. Offer
171. Online marketing
172. Opt in
173. Pre-approved
174. Quote
175. Rates
176. Refinance
177. Removal
178. Reserves the right
179. Score
180. Search engine
181. Sent in compliance
182. Subject to…
183. Terms and conditions
184. Trial
185. Unlimited
186. Warranty
187. Web traffic
188. Work from home
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