RE: [RFC] imap-send: support oauth2

Nicolas Morey-Chaisemartin wrote:

2FA/OAuth2 becoming a more and more regular thing these days (and a lot of SUSE devs being recently impacted by it), I've thrown together a quick patch
to allow imap-send to support it.
This uses https://github.com/jeffmahoney/oauth2-clientd. It can be used with Outlook365 or Gmail. It creates a file with a token to be used to authenticate.
As libcurl supports this type of authentication, it is quite easy from there.

While trying to implement this is nice, it takes way more effort just to
get a client id and secret than it takes to setup an app password.

Plus I think this is abusing Google Cloud Platform. The point is to
register an application once, and that application can have thousands of
users, not thousands of users registering thousands of applications each
used by a single user.

If you have an email service with OAuth2 authentication that doesn't
require a client secret, then yeah; OAuth2 makes sense. I am not aware
of any popular one though.

Cheers.

-- 
Felipe Contreras