If the open-source community can read the carbon-based ink inside carbonized ancient scrolls, then there is likely no need to open normal mail to read what it says.
"These scrolls were scanned at Diamond Light Source, a particle accelerator near Oxford, England. The facility produces a parallel beam of X-rays at high flux, allowing for fast, accurate, and high-resolution imaging. The X-ray photos are turned into a 3D volume of voxels using tomographic reconstruction algorithms, resulting in a stack of slice images."
That article is really cool BTW, amazing stuff. Give it a read.
https://scrollprize.org/grandprize