Robert Edmunds Sincerely Open punctuation omits any type of punctuation after the salutation and closing. In business letters in the United States a colon is standard after the greeting and a comma is standard after the complimentary close. Writing A Letter Anchor Chart Detailing The Different Parts Heading Greeting Body Closing Letter Writing Anchor Chart Anchor Charts Writing Anchor Charts Dear Mr Miller or Dear Mr Miller In American English use a colon. Business letter greeting punctuation . Use dashes in business writing to interrupt sentences and show ranges of numbers. Both British and American English make use of similar words for salutations in emails and letters. In British English dont use any punctuation mark or use a comma. You use closed punctuation with abbreviations introductory greetings or a letter closing. To Whom It May Concern. The standard business letter. Salutations or greetings in formal letters and emails are followed by a colon. When you ...