[nextgens]

It would be great if Google supported rfc8414 and rfc7591. Right now most MUAs hardcode credentials instead of auto-discovering/registering/configuring them and decline to implement those standards "because the big boys don't support them". The practical result is that one cannot use oauth2 on their domain easily: the MUA needs to be told about which set of oAuth2 creds to use.

See https://searchfox.org/comm-central/source/mailnews/base/src/... , https://github.com/thunderbird/autoconfig/tree/master/ispdb and https://bugzilla.mozilla.org/show_bug.cgi?id=1602166