On Saturday 14 August 2010 16:09:13 you wrote:
> On Saturday 14 August 2010 10:09:00 Volker Armin Hemmann wrote:
> > On Tuesday 10 August 2010, Mick wrote:
> > > Any idea how I can reset this certificate as far as Kmail is concerned?
> > > When has it stored my clicking to save the acceptance of the
> > > certificate and how can I reset this?
> > 
> > you can always dive into .kde/ and remove the offending lines from the
> > config files...
> 
> Thanks, that's what I'm trying to find out - which file and which lines. 
> I've had a poke around but couldn't find anything relevant.

OK, found it!  The solution was to remove 
.kde4/share/config/ksslcertificatemanager
-- 
Regards,
Mick