OAUTH2 explained

[Costas]

• Google present it as
• 
• Microsoft present it as
• 

ref - https://github.com/robocorp/example-oauth-email

• Limi labs
  • OAuth 2.0 with Office365 (microsoft IMAP / POP3 connectivity analyzer)
  • OAuth 2.0 with Gmail
• EmailArchitect
  • Retrieve email using Gmail OAuth 2.0
  • Retrieve email using Microsoft OAuth 2.0

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Python app - email-oauth2-proxy - An IMAP/POP/SMTP proxy that transparently adds OAuth 2.0 authentication for email clients that don't support this method