This should really be part of our VSD new release for strategic reasons. But I needed to update GpgOL in there anyway compared to Gpg4win. GpgOL currently shows a kind of incomprehensible error when there is no S/MIME secret key available for singing and sign is selected. Since a very important customer still does always_sign in their default config this is usually the first contact that they have with our Software. They cannot send mails until they disable the signing.
We want to just put a configurable registry key in there so that customers can link users to their internal procedures on how to obtain an S/MIME certificate. Bonus points if the dialog actually checks for alwaysSign and either offers to not to prefer S/MIME in that case (because OpenPGP keys can be selfgenerated on the fly) or allows to disable alwaysSign.