I'm experiencing the exact same problem with a http://www.startssl.com/ certificate and with self signed certificates. I wonder if I am missing something obvious or if it is really a bug.
I've found advice on the web reported to be successful. It said to add the following line to ~/.gnupg/gpg-agent.conf: allow-mark-trusted that line gets added when I go into Kleopatra's menu Settings => Configure => GnuPG System => GPG Agent and check the "Allow clients to mark keys as trusted" checkbox. But it did not work for me. Maybe it works for you? -- Kmail silently rejects S/MIME Certificate https://bugs.launchpad.net/bugs/584027 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs