IMAP, SMTP - GMX Support
https://support.gmx.com/pop-imap/imap/imap.htmlIMAP 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.
Setting Up Outlook (IMAP) - GMX Support
support.gmx.com › pop-imap › imapClick Connect. Choose the account type IMAP. The dialog IMAP Account Settings will open up. Use the following settings: Incoming mail: Server imap.gmx.com with port 993 and check the option This server requires an encrypted conncetion (SSL/TLS) Outgoing mail: Server mail.gmx.com with port 587 and the encryption method STARTTLS. Click Connect.
POP3 - GMX Support
support.gmx.com › pop-imap › pop3POP3. The POP3 protocol allows you to download your email and read it while being offline. POP3, SMTP. POP3 Server Data. Mobile Devices. Setting Up Outlook (POP3) Setting Up Thunderbird. Setting Up Apple Mail.