If you configured a system-wide SOCKS proxy, Dino will honor that setting.

Otherwise, you can specifically set Dino to use Tor by starting it with

$ torsocks dino

You can have your system route DNS requests through Tor by writing nameserver 127.0.0.1 into your /etc/resolv.conf.

XMPP uses SRV records by default, which cannot be queried through Tor. As a fallback, XMPP uses A records, which can be queried through Tor. Thus, make sure the domain of your server has an A record set to the IP of the XMPP server. Public servers are very frequently set up accordingly.

• Download and install the Dino Debian package from OBS.
• Start Dino from the console with torsocks dino.
• Don't worry about DNS - Tails forces all traffic through Tor.