Here you can find the relevant information for the server data to synchronize your GMX mailbox with a third party application.
| Incoming (IMAP) | Outgoing (SMTP) | |
|---|---|---|
| Server | imap.gmx.com | mail.gmx.com |
| Port | 993 | 587 |
| Encryption | SSL oder encryption | STARTTLS, TLS oder encryption |