이모티콘이나 너무 어린아이 같은 표현, 상투적인 표현은 적당하지 않다. 또한, 프라이버시를 방해하는 질문은 삼가야 한다.

1. Kisses :-*
   68 percent of workers say emoticon kisses in emails to clients are annoying.
2. Sugar Pie, Honey Bunch
   54 percent said they were not into terms of endearment like “honey” or “dear.”
3. Elements Of Style
   65 percent of respondents view simple grammar and spelling mistakes as “shoddy,” saying such errors would cause them to “have no faith” in the person who sent the email.
4. OMG
   Half of respondents said they didn’t think abbreviations like OMG had any place in work emails.
5. ‘Happy Friday’
   28 percent of respondents don’t like cheesy or familiar lines like “Happy Friday.”
6. No OOTO Message
   But 58 percent of office workers said they wouldn’t do business with people who don’t leave automated out-of-office notices at all.
7. Smiley Faces 🙂
   44 percent of respondents think smiley faces in emails are inappropriate.
8. Abrupt OOTO Messages
   46 percent of respondents are irritated by rude or abrupt out-of-the-office messages.
9. Weekend Plans
   17 percent of respondents said they didn’t like to be asked about weekend plans in emails.

출처: 9 Email Fails Sure To Make Your Coworkers Hate You (기사 하단 동영상에는 이메일 정리하는 방법도 설명하는군요. embed 코드가 여기에서 작동이 안되서 링크만 남깁니다)

참고글: Email Tips: 5 Ways to Get Action | Inc.com.