Come on guys. If you are sending stuff that cannot be seen for some reason (potentially illegal on your (potentially) authoritarian (and this includes the US) c

Come on guys. If you are sending stuff that cannot be seen for some reason (potentially illegal on your (potentially) authoritarian (and this includes the US) country) do not use e-mail. It’s a protocol from decades ago when the web was gentle and naive. For SMTP to work lots of stuff must be readable by the MTAs handling the message. It is also highly centralized nowadays because it essentially works on a whitelist of what the big providers allow. Just give up.