ProtonMail

It's broken.

Unfortunately, Protonmail doesn’t offer IMAP, so you cannot log in with chatmail to Protonmail.

If you really want to use Protonmail, you can check out their IMAP bridge at https://protonmail.com/bridge/, however, note that the bridge does not work on all operating system and not on all Protonmail accounts.

Last checked: 2019-02