It sounds like the real fix for this is to change kmail's behavior If none of the involved parties is willing to, I volunteer to take it to the kmail mailing list at:
subscribe:
mailto:[EMAIL PROTECTED]
archive:
http://lists.kde.org/?l=kmail&r=1&w=2
I did notice that there is a bug already entered along these lines
(#29634) that indicates kmail may not yet have support for PGP/MIME.
/paul
