Sending emails with Gmail SMTP servers
Two ways of authenticating
Gmail’s SMTP servers support two ways of authenticating.
1. The classical user/password authentication
2. The OAuth2 authentication https://developers.google.com/gmail/oauth_overview#protocol
Currently, Semarchy xDI’s SMTP metadata supports the classical user/password authentication.
Allowing "less secure apps" in the Google account
By default, a Google account allows only Google apps to connect to their services with username/password.
In order to use third party Email clients with username/password, the Google account owner has to enable the "Allow less secure apps" setting.
xDI is - in a way - a third party Email client, so this requirement applies.
In order to enable this setting, please follow Google’s instructions.