#35c3 Emails are like postcards unless you encrypt them.
I was one of the recipients of one of these, presumably encrypted to me, postcards.
Sadly I wasn't yet able to decode, let alone decrypt the message. (Invalid armor header, CRC errors)
If you'd like to help anonymously to make GPG at least accept the input message, here's a CryptPad: (No logging, no login required, tor friendly)