Etiquette: Business Email Manners - as part of the expert series by GeoBeats. Email is the most common form of communication in business today. Always treat you email like a business letter, include a greeting and a salutation. Always keep it brief and relevant and do a spell check. You do not want an email littered with misspelled words or poor punctuation, and never post anything in an email you would not want printed on the front page of your local newspaper. And finally never send an email when you are angry, remember it does not matter how bright or talented you are, if you practice poor email etiquette it can be a career killer.