[FEATURE] SMTP sender authentication via OAUTH2

[javad87]

Is your feature request related to a problem?
I would like to config SMTP sender for microsoft online mail service; however, basic authentication is depricated (https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-basic-authentication-exchange-online) and for security reason, microsoft, forced using OAUTH2. as far as, I know most mail services disabled using basic authentication or like gmail consider it as unsafe!

What solution would you like?
I would like to be able to config SMTP sender, so that; it can authenticate via OAUTH2 or other secure methods that most mail servers support especially for my case microsft Exchange server.

[pawelw1]

Missing feature originally reported in Opensearch Forum
https://forum.opensearch.org/t/how-to-config-smtp-sender-with-oauth2-for-microsoft-exchange-online-azure/21220

[dblock]

[Catch All Triage - 1, 2, 3, 4]