Massive Analogue Hole
Oh yeah, snail mail is a massive analogue hole.
It's worth asking the government about how they're going to deal with that massive hole:-
1. Write a letter. On paper. With a pen.
2. Fold it up, and stick it into a folded piece of card.
3. Put the letter, inside the card, into an envelope.
4. Seal the envelope.
5. Write the destination address on the front, and affix a stamp.
6. Post it.
(The card is to block light, so that attempts to read the contents by shining a light through it won't work.)
How will the government answer? How could they possibly answer?
If they're going to introduce changes to postal requirements, then that itself proves they're not simply maintaining capability (which is an oft repeated lie of theirs).
If they're not going to introduce changes to postal requirements, then obviously it's a massive, exploitable hole. But if, with the internet, they're only maintaining capability, how could old snail mail be a massive analogue hole in comparison? Again, it demonstrates that they're not maintaining capability.
And if they are intending to change the rules about snail mail, there's the question: why didn't they need to have such rules back in the Cold War, when we faced the far bigger threat of nuclear annihilation?