2022-06-30: Encrypted email and gpg hidden-encrypt-to        rak
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If you are not careful when sending gpg-encrypted emails, you
may encrypt the message only to the recipients and be unable
to read them later. To prevent this, you can add the following
option to your ~/.gnupg/gpg.conf:

    hidden-encrypt-to your-gpg-key-id

The effect is that gnupg always includes your gpg key id as a
hidden recipient when encrypting, so that you can later decrypt
files or messages. See --hidden-encrypt-to in gpg(1) for
details.