Authentication: OAuth2; Method selection
Balsa should be able to support OAuth2 (used by RFC 6749, RFC 6750) authentication which is used by, inter alia, GMail.
Furthermore, the Server requires authentication (bool) selection in the server configuration dialogues seems to be insufficient, as a remote server may support passwordless (e.g. GSSAPI aka Kerberos) authentication which Balsa currently uses as preferred method, but the user wants to enforce trying a username/password method. Thus, the check box should be replaced by a choice Authentication method supporting
- OAuth2
- GSSAPI
- username and password
- none required
as options.
There should be a possibility to test the selected method in the server configuration dialogue as well as in the wizard.