I asked my professor at the university to write a letter of reference for a job application. I am currently working in her lab as a research assistant, and she gladly did that. When I read her letter I cried tears of joy, so my question does the following sentence makes sense?
This letter made me cry tears of joy and appreciation because of your kind words.
Q2: Is it appropriate to express your emotion in a professional setting?
Note: I am trying to convey the sense that her letter touched my heart, well written, and I will always be thankful.