Make Kmail accept mail server key

[Mark Kelly]

Hi.

I use a mail server provided by my webhosts using TLS. The key used on the 
server end is for *.mywebhost.com and I connect to it as mail.mydomain.com 
which causes kmail to pop up a requester warning me about the disparity 
and asking if I want to continue. All very nice. 

However when I tell Kmail to remember and accept the key forever it never 
does, and I am prompted every time I send the first mail of the day.

Can anyone advise me on how to get Kmail to remember my choice?

Thanks,

Mark