How To Write A Posperal Letter . Include the following on separate lines: Start the letter with a salutation. Post Haste Direct Mailing Services Direct Mail Fundraising Tips to from posthastemailing.blogspot.com Follow these steps when writing a formal letter: Here are congratulation letter and email message examples for a variety of professional situations, including a new job, a promotion, starting a business, retiring, accomplishments at work, volunteering, and more. Write your name, address and contact information at the top of the page, typically aligned on the left or right side.