dynbox.eu has three dns servers.
Two placed in Canada (god knows where)
One placed in Germany (pretty certain it's near berlin)

The dns servers runs our own, supercool, software.
One of these servers also run a SMTP-server (built in into the DNS software).
Currently it's in a beta stage, but everything works like a charm.

Each server updates their zones and records every 60 seconds.
Atleast it should.