Internet Explorer has a Compatibility View. This function affects how websites are displayed.
The Compatibility View must be deactivated for the use of the GMX mailbox. If you only see a white screen showing One moment please during login, you will have to adjust the security
settings of your Internet Explorer.
How to deactivate the Compatibility View in Internet Explorer
The Compatibility View
GMX is deactivated.
Alt key to open the menu
bar and click
Compatibility View settings.
Websites you've added to Compatibility View,
Close the window.
How to activate Active Scripting in Internet Explorer
Click the gear icon to open the menu.
Click Internet options.
Active Scripting is activated.
Select the Security tab.
Click Custom level....
You will see a list with individual security settings.
Set Active Scripting to Enable.
Confirm both the security and Internet options with OK.