Hey: 64 percent Hello: 63.6 percent Hi: 62.7 percent Greetings: 57.2 percent Dear: 56.5 percent All emails: 47.5 percent While you might think that a five to eight point swing in response rate ...

Is "Dear" overly formal? Is "Morning!" too cheery? If you're thinking the email greeting isn't all that important and that it's silly to overthink it, you're wrong.

Use a formal closing. Conclude your email with a closing, such as “Best regards”, “Sincerely”, or “Thank you” followed by your name. ... Example email to a professor: Dear Professor Smith, My name is ...

In general, an email should be addressed ‘Dear’ followed by the recipient’s name or title (Mr, Ms, Lord, Dr) and surname. Can you ask how someone is if you're writing to them for the first time?