Run an errand for me (your local post office)

I need you to mail two letters for me. Note that you must live in Idaho. As part of your proposal, please indicate the zip code or county where you live. I am living overseas currently, which is why I need someone to mail the letters for me. I will send you the letter you need to mail. Once you receive a reply, I'll have you forward that letter to my permanent mailing address. No cost to you from postage. I know it sounds weird, but it's not -- I'll explain more via chat or email. Willing to pay $40 -- $20 up-front and another $20 once letters are mailed + received.