When writing a business letter, the greeting is followed by a colon instead of a comma.
If you know the name of the person to whom you are addressing the business letter, use their name with a colon, like this:
Dear Dr. Madison:
If you are unsure about who will be reading the letter, you can write a greeting like this:
To Whom it May Concern:
Use a colon after the greeting when writing a business letter.
▶Now you try it. Insert a colon into this piece of writing. Dear Ms. Jordan I am writing to inquire about the job opening at your company. I have included my resume and look forward to hearing from you. Did you put the colon right after the greeting? Good for you!