What is a punctuation mark placed after greeting?

The punctuation mark placed after a greeting depends on the type of communication:

Formal:

* Comma (,) is used after a greeting in formal letters, emails, and other written communications.

* Example: "Dear Mr. Smith, I hope this email finds you well."

Informal:

* Exclamation point (!) can be used after a greeting in informal messages, like texts and emails to friends.

* Example: "Hey John! How are you doing?"

Note:

* It's generally best to use a comma in formal settings, even if you're close to the recipient.

* Using an exclamation point can be considered too informal in formal communication.

* You can also use a colon (:) in some cases, especially if the greeting is followed by a list or explanation.

* Example: "Dear Ms. Johnson: I am writing to inquire about..."

Always consider the context and tone of your message when choosing a punctuation mark after a greeting.