How to configure automatic synchronization of your GMX default calendar with Mozilla Thunderbird

Info:

Calendar functionality was integrated into Thunderbird with version 78.0. If you don't see any options to add or view a calendar, please make sure to update Thunderbird to the latest version.

  1. Click on the menu icon in the top right corner of the Thunderbird window.
  2. In the New submenu, select Calendar.
  3. Select the On the Network option and then Next to continue.
  4. Select the CalDAV format.
  5. In the Location field, enter the path https://caldav.gmx.com/begenda/dav/your GMX e-mail address/calendar.

Example: For the e-mail address john.doe@gmx.com, you enter https://caldav.gmx.com/begenda/dav/john.doe@gmx.com/calendar/ as the location.

  1. Click Next.

    Configure the synchronization with Mozilla Thunderbird

  2. Give the GMX Organizer a name and, if applicable, a color. Appointments from this calendar will later be displayed in the color. Click Next.
  3. Enter your GMX e-mail address and password. Confirm by clicking OK.
  4. Complete setup by clicking Finish.
Your GMX "My Calendar" default calendar is now synchronized with Mozilla Thunderbird.