ProtonMail and Anonymity

[Mirimir]

On 05/09/2019 01:03 PM, Stefan Claas wrote:
> Am Thu, 9 May 2019 15:28:36 -0400
> schrieb Tony Lane <codeguro at gmail.com>:
> 
>> Uhh... no.
>> You can absolutely hide the recipient with the '-R' option in Gnupg.
>> -----BEGIN PGP SIGNATURE-----
> 
> 
> Sorry for my bad wording! I was refering to the email recipient, when
> using a standard MUA which sends to a regular single email address.
> 
> Of course the -R option allows to send to someone and when the mail
> arrives the message can then be handed over to the real recipient. ;-)
> 
> Regards
> Stefan

Or one can send to alt.anonymous.messages, or wherever. And recipient(s)
can periodically download everything, and simply try decrypting each
message. I don't recall now whether remailer nyms worked exactly that
way. Maybe client apps depended on seeing recipient IDs. Or maybe hashes
of recipient IDs. It's interesting, but doesn't scale well.