We have a decon system for packages. They get sprayed down, outside....with disinfectant. Then, left to dry, for a while.
The mail is trickier.
Mail is like a little potentially infective leaf fall that arrives 6 days a week...
even if your letter wasn’t mailed by someone infected...it may have touched an infected letter somewhere in the bowels of the mail sorting equipment.
and who cleans the mail sorting equipment? Is that a total viral nightmare by this time yet?
“The mail is trickier.”
I put my mail in the toaster oven on 200 for 10 minutes. I read where the burning point of paper is 400 degrees, and the virus is destroyed at something like 180 degrees for 5 minutes.
I forgot about the little plastic windows in the envelopes - they melted a bit, but no damage to the contents.