Most common reason: Inactivity
If you are logged in to your GMX Account and are not active for a long time, for example if you close your laptop or minimize the browser window, you will be automatically logged out.
Listed below are a few of the most common reasons for this to happen.
If you are logged in to your GMX Account and are not active for a long time, for example if you close your laptop or minimize the browser window, you will be automatically logged out.
In some rare cases, a logout can be caused by a technical issue, for example while switching between services (e.g. Mail, Cloud).
Login again via www.gmx.com.
Check your inbox for any activity that suggests third-parties might have had access to your account. You can find more information under How was my email account hacked?