Tips for Email Etiquette
After many years in academia and business, there are three major tips that I've found really help.
Always Use the Same Formal Greeting and Farewell
When I first starting writing emails for professional and diplomatic people, I wasn't sure how to address people and to close the email. I tried to be too formal and even simple emails became complicated. Then I remembered the rules of letter writing. Start with a greeting like Dear (name), write clear sentences that get to the point, and I always sign the email with the same farewell: Kind regards, (your name).
Once the email chain has been established, it is fine to not use this system in reply emails. However, for every email, even if it's just asking for a price quote to order paper, always use a polite greeting, clear, simple sentences that get to the point and a proper farewell. Once you get into the habit of this, it will seem strange NOT to write an email with your formula.
What to Do When You Get the Wrong or Impolite Email
Without a doubt, you will most likely get an email one day from a colleague or other business-like associate who doesn't know the rules of email etiquette like you do. That may be an email that was accidentally sent to you or a short message that looks impolite. The best thing I learned is to not take it personally and to realize everyone makes mistakes.
Once, I accidentally received three emails of things I was not supposed to see (private conversations, management details, etc.). Rather than cause embarrassment, I ignored them and went on with my work. Unless it is something illegal, the best thing you can is realize that everyone makes mistakes.
What to Do If You Make a Mistake
Lastly, what should you do if you make a mistake? I'll give you an example. Carbon-copy (CC) and blind carbon-copy (BCC) are areas where people make common mistakes. The email goes to the wrong person or doesn't go out at all. Sometimes it goes out too early. I was in charge of an organization's newsletter that went out not only to local and regional officials, but national government leaders as well. After completing our last check from my department head, I sent out the scheduled quarterly newsletter, on-time, to our standard CC and BCC list.
That very same day, our Chief had an emergency meeting and there was a complete redirection in one of our main programs. I had to redo the front page of the newsletter immediately to show this change. Rather than sending an email recalling the original newsletter, I realized a mistake could be a strength. I managed to send an amended newsletter by the end of the day. In the outgoing email, I highlighted the error of sending out the newsletter too early and brought attention to the change. If you do make a mistake, other than a spelling error, politely take responsibility and fix the error.