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Answers for private customers

The Knowledge Base for private customers is already largely up to date. A few individual articles are currently being revised and will be updated shortly. We thank you for your understanding and look forward to providing you with the latest information on using mailbox.

Please note: The Knowledge Base has changed slightly. Categories have been adjusted and any URLs stored in the old Knowledge Base are no longer valid.

How to use Chat with a custom domain

Use Chat (XMPP Jabber) with your own domain​

Note: The functions described here are available in the Standar and Premium plans.

To use the Extensible Messaging and Presence Protocol (XMPP, formerly “Jabber”) with your own domain, the following requirements must be met:

  • Your external domain must be stored at mailbox and entered as a usable mail address. You can then use this mail address for your XMPP account.
  • Our XMPP server updates its configuration every hour. It may therefore take a few minutes until your mail address is activated.
  • In the Domain Name System (DNS) of your domain, the two entries below must be created. These settings must be made at the provider where you registered your domain. Please replace example.com with your own domain, as shown in Listing 1.
  • Afterwards, you can create a support ticket in our portal support.mailbox.org so that we can activate your domain for XMPP. Due to DNS cache times, it may take up to one day until the new entry is functional and available everywhere.

Listing 1: DNS entries for Jabber domains​

_xmpp-client._tcp.example.com. 3600 IN SRV 0 5 5222 xmpp.mailbox.org.

_xmpp-server._tcp.example.com. 3600 IN SRV 0 5 5269 xmpp.mailbox.org.

If everything worked correctly, you can now set up your XMPP client using your mail address as the username and your mailbox password. The DNS entry informs your XMPP client which server it should connect to. Other XMPP servers also need this information so that XMPP messages can be delivered correctly.

Catch-all address not possible​

For technical reasons, it is unfortunately not possible to use the catch-all account of your own domains for XMPP accounts.

Encryption & SSL certificates​

Communication with our XMPP server is only possible via encrypted connections with Transport Layer Security (SSL/TLS).

  • SSL/TLS uses digital certificates for secure encryption.
  • The use of self-signed SSL certificates is not supported.
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