Here you can find the relevant information for the server data to synchronize your
GMX mailbox with a third party application.
The free GMX Mail App is a
much more convenient way to check your emails on your smartphone or tablet. You can download
the GMX Mail App for Android from the Google PlayStore or for
iOS from the Apple App Store.
SSL or encryption
STARTTLS or encryption
You can only use a TLS protocol if your email program uses TLS versions 1.2 or 1.3. For security reasons, we no longer support
the older TLS versions 1.0 and 1.1.