Relative merits of secure email services
 

The more responsible members of the media, particularly those that expose government crimes and abuses, provide on their websites information on secure means to contact their journalists. This seems to usually be a form of encrypted email using PGP and TOR.

How does the security of encrypted email services such as Tutanota and ProtonMail compare with the systems offered by the media?

https://securedrop.theguardian.com/

https://sec.theglobeandmail.com/securedrop/