User is authenticated but not connected (using outlook.com email)

Posting how I solved this here as nothing in this forum worked for me:

Instead of adding and Outlook.com or Office365 account with the Automatic Setup, enter account details manually (selecting EMAIL->Other), I used these settings:

  • Incoming server: outlook.office365.com
  • Outgoing server: smtp-mail.outlook.com
  • User:
  • Password: (Application password generated in your Microsoft Account)

The app password is the important part, the automatic way to add a Outlook account uses a different authentication method which seems to be unstable with eMClient, while with this method eMClient authenticates with this one off app password.

I have not had the error again since.

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