A comma is not required in the salutation of an editorial letter. You can use either a comma or a colon after the recipient's name. For example, "Dear Editor," or "Dear Editor:".
Comma
A comma is typically used after a salutation in a letter or email.
Note
It used to be considered correct to put a comma after the saltation as: Dear Sir, Nowadays the comma is often left out.
exclamation poi nt. It should be-- Hi!
The opening of a letter is called a salutation. It typically includes a greeting, such as "Dear [Name]," followed by a comma.
comma
Yes, it is correct to use a capital letter after the comma in "Dear Sir" as it is used as a salutation at the beginning of a letter or email.
In a letter, place a comma after the salutation and after the closing. For example, in the greeting, you would write "Dear John," and at the end, you would write "Sincerely," or "Best regards," followed by a comma. This punctuation helps to separate the different parts of the letter clearly.
It is almost always a comma, but rarely I have seen a colon. When you are writing a formal letter, it is a comma, but if you were to write a informal letter to a friend, it doesn't really matter. For all of the letters I write I use a comma, and so does everybody else I know.
The situation that requires the use of a colon is d) the salutation of a business letter. In formal business correspondence, it is customary to follow the salutation (e.g., "Dear Mr. Smith:") with a colon to denote the start of the letter's body. In contrast, personal letters typically use a comma after the salutation.
a comma, unless you write "To whomt it may concern", then you should put a colon (:)