12 Common Work Email Mistakes By Andrew G. Rosen April 7, 2011 Comments SHARE Failing to include basic greetings. Next » 1 of 12 iStockPhoto Simple pleasantries do the trick. Say “hi” at the start of the message and “thanks” at the end. Be sure to use the recipient's name. Be polite yet brief with your courtesy. Next: Expecting an instant response.