There are two different ways to use MailCheck. After installation, MailCheck appears in minimized mode by default. The number next to the envelope icon informs you of new e-mails. Click the envelope icon to open your GMX mailbox. Click the arrow to open the drop-down menu. In this menu, you can manually check your mailbox for new e-mail, open your mailbox, adjust the settings or maximize MailCheck.
In maximized mode, GMX MailCheck looks like a toolbar. You can adjust the settings to show or hide individual buttons. The buttons are displayed as just icons or as icons and text depending on the size of the browser. Click the arrow next to the wrench icon to open the drop-down menu. The drop-down menu takes you to other MailCheck functions.