Basic authentication (with username and password) is only supported for custom mail server connections. Connecting to Gmail or Microsoft accounts requires OAuth2 for security reasons.
Instructions for connecting to a custom mail server can be found in the Custom Mail Server: Basic Authentication article.
OAuht2 credentials are required to connect to Microsoft as well as Gmail servers.
To manage the OAuth2 Credentials, go to the Administration configuration tab and choose OAuth2 Credentials under the OAUTH2 menu item.
Detailed steps for creating the OAuth2 credentials can be found in their respective articles_
Microsoft with OAuth2
Gmail with OAuth2
Last updated 1 month ago
