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) | Outgoing (SMTP) | |
|---|---|---|---|
| Server | imap.gmx.com | mail.gmx.com | mail.gmx.com |
| Port | 993 | 587 | 465 |
| Encryption | SSL or encryption | STARTTLS or encryption | SSL/TLS |