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.
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:".
After "Dear Billy," it is common to use a comma before continuing with the rest of the message. This punctuation helps separate the greeting from the main body of the text.
Yes, when addressing someone directly in a letter or email, you should typically use a comma after the salutation. For example, "Dear Sir," or "Dear Mr. Smith,".
a comma
The comma always goes after the name in the beginning of a letter.
yes u do you put it like this Dear teacher, then u carry on with your letter
yes.
Yes, a comma is used after the salutation in a formal letter. For example, "Dear Mr. Smith,".
yes
In business letters, you should use a colon (:) if you use any punctuation. The new way is to have no punctuation after the greeting in business letters. But if you omit punctuation there, you also have to omit the comma after the closing. In personal letters, people use a comma after the greeting.
Formal salutations are always followed by a colon. (Dear Sir Only in informatal writing do you use a comma. (Dear Sue,)