It's important to note here that OAuth isn't one thing anymore like it was for OAuth 1. With OAuth2 it's more like OAuth is a toolset for implementing your own proprietary protocol. Each major provider needs it's own custom implementation in email clients to cover it. There's no general purpose oauth2 in practice. OAuth2 is more like a per-corporation protocol.
Lets hope they don't sunset "app passwords" for at least a few more years. If you haven't yet, consider setting up your own mailserver for kicks and using it for non-important things to build IP reputation for when public email stops being email entirely.
Lets hope they don't sunset "app passwords" for at least a few more years. If you haven't yet, consider setting up your own mailserver for kicks and using it for non-important things to build IP reputation for when public email stops being email entirely.