<Mention Recipient’s Address Here>
Dear <Recipient’s Name>,
This is none of my business, Mr. President, but I do have a question which has been driving me crazy, and I just had to write and ask you. <question>.
I know this is a rather personal question to be asked through the mail, and I don’t know if you will even answer, but I had to try.
Thank you very for your time and consideration. Would be looking forward to your response.
Encl: <List of enclosed items goes here>