>>>>> In <ilur7p7oex8.fsf@latte.josefsson.org> Simon Josefsson wrote:

> Hm.  Font-locking doesn't work alright.  But I can't find out why.  To
> me, dns-mode.el seem to do the same as sieve-mode.el and dig.el for
> font lock keywords, and both of them work.  Anyone?

In `dns-mode-font-lock-keywords', faces seem to have to be
existing face symbols.  So, defining all dns faces by defface or
modifying `dns-mode-font-lock-keywords' as follows would solve it.