| No. | Item | Definition |
|---|---|---|
| 1. | acknowledgment | A message confirming receipt |
| 2. | advisory | An official informative message |
| 3. | alert | A warning or notice message |
| 4. | announcement | A message sharing news publicly |
| 5. | answer | A message replying to another |
| 6. | auto-reply | An automatic response message |
| 7. | automated message | A message sent automatically |
| 8. | autoresponse | An automatically generated reply |
| 9. | brief message | A short communication |
| 10. | broadcast message | A message sent widely |
| 11. | bulk message | A message sent in large numbers |
| 12. | bulletin | A brief official message |
| 13. | business message | A professional written communication |
| 14. | client message | A message from or to clients |
| 15. | communiqué | An official written message |
| 16. | company message | A business digital communication |
| 17. | computer mail | Mail sent by computer |
| 18. | confirmation | A message verifying something |
| 19. | corporate message | A formal company communication |
| 20. | correspondence | Written communication between people |
| 21. | customer message | A message involving customers |
| 22. | detailed message | A message with full information |
| 23. | digest | A summarized collection of messages |
| 24. | digital letter | A letter sent electronically |
| 25. | digital message | A message sent electronically |
| 26. | dispatch | A sent official message |
| 27. | Hyphenated form of digital mail | |
| 28. | electronic letter | A letter sent by digital means |
| 29. | electronic mail | Messages sent digitally between users |
| 30. | electronic message | A message sent by computer |
| 31. | encrypted message | A coded secure message |
| 32. | external message | A message sent outside an organization |
| 33. | follow-up | A later related message |
| 34. | formal note | A polite official message |
| 35. | group message | A message sent to multiple people |
| 36. | helpdesk message | A message for technical support |
| 37. | inbox message | A message received in an inbox |
| 38. | incoming message | A message being received |
| 39. | inquiry | A message asking for information |
| 40. | internal message | A message within an organization |
| 41. | internet mail | Mail sent through the internet |
| 42. | interoffice memo | A message between office staff |
| 43. | invitation | A message asking someone to attend |
| 44. | junk mail | Unwanted promotional mail |
| 45. | letter | A written message to someone |
| 46. | long message | An extended written communication |
| 47. | A sent digital message | |
| 48. | mailer | A promotional mailed message |
| 49. | mailshot | A promotional mass message |
| 50. | marketing message | A promotional business communication |
| 51. | mass message | A message sent to many recipients |
| 52. | memo | A short business message |
| 53. | message | A written digital communication |
| 54. | netmail | Informal term for internet mail |
| 55. | newsletter | A recurring informational message |
| 56. | note | A brief written message |
| 57. | notice | A message giving information |
| 58. | notification | An alerting digital message |
| 59. | office memo | A workplace written message |
| 60. | office message | A workplace digital message |
| 61. | online message | A message sent over the internet |
| 62. | outbox message | A message prepared for sending |
| 63. | outgoing message | A message being sent |
| 64. | personal note | A private friendly message |
| 65. | phishing message | A fraudulent information-stealing message |
| 66. | pitch | A persuasive business message |
| 67. | promotional message | A message advertising something |
| 68. | proposal | A message suggesting a plan |
| 69. | query | A message posing a question |
| 70. | question | A message asking something |
| 71. | quick note | A brief informal message |
| 72. | receipt | A message confirming delivery or payment |
| 73. | reminder | A message prompting memory or action |
| 74. | reply | A response to a message |
| 75. | request | A message asking for something |
| 76. | response | A message sent in answer |
| 77. | sales message | A message intended to sell |
| 78. | sent message | A message already sent |
| 79. | solicitation | A message seeking business or support |
| 80. | spam | Unwanted bulk digital mail |
| 81. | staff message | A message for employees |
| 82. | submission | A message sent for consideration |
| 83. | team message | A message shared with teammates |
| 84. | thank-you note | A message expressing thanks |
| 85. | thread | A connected series of messages |
| 86. | ticket | A tracked support message |
| 87. | update | A message giving new information |
| 88. | urgent message | A message needing quick attention. |
| 89. | urgent note | A note needing quick attention. |
| 90. | user message | A message from a user. |
| 91. | user notification | A notice sent to a user. |
| 92. | vendor message | A message from a supplier. |
| 93. | verification message | A message confirming identity or action. |
| 94. | verification note | A note confirming something. |
| 95. | webmail | Email accessed through a browser |
| 96. | weekly update | A regular update sent weekly. |
| 97. | welcome message | A greeting sent to someone. |
| 98. | work message | A job-related digital message |
| 99. | workflow message | A message about a work process. |
| 100. | written message | A message expressed in writing |