I installed S/MIME plugin and it works as expected. When I want to sign a mail, I click on the “Sign” icon, DeskApp asks for the decryption password and signs the mail.
Unfortunately DeskApp do not store the password, so I have to enter the decryption password for every mail. I enabled this parameter:
SLES 12 with all patches.
Any ideas how to store the decryption password in DeskApp?