Words similar to thank-you

Example sentences for: thank-you

How can you use “thank-you” in a sentence? Here are some example sentences to help you improve your vocabulary:

Is it proper etiquette to e-mail thank-you notes?
I doubt that I will send thank-you notes for wedding gifts this way, but I am curious to know what others think, especially Emily Post.
I got a thank-you e-mail too.
I believe thank-you notes to persons you know and care about should be individually handwritten and sent by snail mail.
But whenever I e-mail a thank-you note (for dinner parties or gifts), I always end up sending a snail-mail note as well--out of guilt.