Below are thank you email marketing templates to help you better understand the right format for thank you emails you can use. Learn how to write an employee appreciation letter with these templates and examples.Download the template for free (PDF or Word). I am so very thankful for your time. Guidelines for writing appreciation letters: State what you appreciate and briefly explain why. Here's a small samples of a appreciation letter done right. Dear Dr. Kagan, Thank you for those moments of sheer joy with you. You have enlightened, motivated, and inspired us to greater heights in education. I'd like to thank you for talking with me about the research- assistant position in your seismology lab. An employee thank-you letter is a message to an employee recognizing their hard work and showing appreciation for their efforts.