Final answer:
In a business letter, a colon follows the name in a salutation, after which there should be a blank line before continuing with the letter.
Step-by-step explanation:
In a business letter, the name in a salutation should be followed by a colon (:). The salutation usually starts with 'Dear' and is followed by the recipient's name and a colon. For example, if the letter is addressed to 'John Doe, PhD', the salutation would be 'Dear Dr. Doe:'. Remember to leave one blank line after the salutation. Whereas the closing of a letter, such as 'Sincerely', should be followed by a comma and includes your typed name below, with your signature in between when printed.