IMAP, SMTP - GMX Support
support.gmx.com › pop-imap › imapIMAP, SMTP. IMAP stands for "Internet Message Access Protocol" and is a protocol for receiving e-mail. This protocol requires a stable Internet connection. IMAP allows you to access your mailbox in real time with an e-mail program of your choice. Any actions (e.g. delete, move an e-mail etc.) will be conducted directly in your GMX mailbox.