"Fee Structure (For Jmail Box):
- $25 Annual Subscription - This fee is to help cover the cost of the large post office box rental we must maintain as well as handling fees.
- $1 per letter (each 6 page images) - When you receive a letter you are charged 1 mail credit for the scanning and processing of the letter to your account up to 6 page images. If your letter is over 6 page images you are charged an additional $1 for each subsequent 6 page images.

A page image is an image of 1 side of a sheet of paper, so a sheet of paper with writing on the front and back would be 2 page images. Two pages of text only written on the front of each sheet is still 2 page images. We delete blank pages so you are not charged for them. If your letter is 7-11 pages you will be charged $2, if your letter is 12-17 pages long you will be charged $3 and so on."

So it will cost your PP the price of a US first class stamp and it will cost you between 3-4$ to download a 14-18 pages letter.