How to connect GMX to Klearbox

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To connect GMX to Klearbox, you need to enable POP3/IMAP access first. This is disabled by default for GMX mailboxes. Sign in to GMX, open POP3/IMAP retrieval, allow access, and save. Then create an application-specific password in the GMX security settings and use it in Klearbox. This process applies to GMX domains such as gmx.de, gmx.net, and gmx.at. For international gmx.com accounts, the login flow is similar, but the mail server names may differ from the German GMX servers.