Hello fran49,

Thank you for your question.

You can access DarwinMail by opening darwinMail.app in your browser and clicking on the Sign in with Google button.

DarwinMail works in the following four steps:
1. The user logs into DarwinMail.app,
2. DarwinMail makes a login request to Google's servers,
3. Google logs the user in,
4. DarwinMail asks for the user's emails at which point this data is rendered in the user's browser.

Please let us know if you have any other questions either through AppSumo, email, Discord, or whatever suits you best, we will be glad to help :)