I apparently do not have a .snapshot folder (I don't see it with ls -a).
It's hidden. Really hidden -- you won't see it with -a but you can cd into it. Try it.
When I run the 'cp' command you gave me, I get the following error:
The -R flag was forgotten. You'll need this to copy directory trees. You can also omit the second command above by adding -p, which will preserve the original permissions. Try it again:
cp [b]-Rp[/b] ~/.snapshot/nightly.1/Maildir ~/Maildir
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