Installing MailCheck

Install GMX MailCheck for your browser. Use different functions and always get an overview over your e-mails at a glance.


GMX MailCheck is compatible with Firefox in version 25 or later. We recommend that you use the latest version of Mozilla Firefox.

  1. Download GMXMailCheck here:
  2. Click on Free Download.
  3. Depending on your security settings, Firefox will ask for your permission before installation - click Allow and then Install now.
  4. Click Restart now.
Firefox will be restarted. Afterwards, you can log in to MailCheck.