SUMMARY Today I needed to send a signed message and Kmail doesn't allow me. It is something I have done in the past without any issues, so I don't know at which point this feature broke for me (but for sure after 22 January when I sent last signed email with the same certificate using Kmail). STEPS TO REPRODUCE 1. Add an S/MIME certificate to an identity 2. Create new email and send it using that identity OBSERVED RESULT When trying to send I get the following error. Sending message failed. Could not compose message: Address family not supported by protocol. EXPECTED RESULT No error when trying to use that certificate as in the past. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux with linux kernel 5.5.4 KDE Plasma Version: 5.18.0 KDE Frameworks Version: 5.67.0 Qt Version: 5.14.1 ADDITIONAL INFORMATION It does work when using a OpenPGP signing key.
Is Kmail development active? These kind of regressions can't happen in a good mail client. I mean, first all the random imap crashes that have been reported since last upgrade and doesn't allow me to use a particular account, and now this. Honestly, I can't use Kmail anymore in the office and I'm trying other clients till these bugs are fixed. It's really a pity since Kmail has been my email client for years... Don't get me wrong. I appreciate all the work from the KDE community, but maybe instead of adding new features would be better to add more tests to detect commits that break things. I would like to be able to contribute to the project and fix them, but I can't. So the only thing I can do is report the bugs. I'm not asking, of course, to be fixed immediately, but at least see some kind of activity. The only thing I see is bugs being closed because they are (sometimes not that clear to me) duplicates.
Trying to debug a different issue (https://bugs.kde.org/show_bug.cgi?id=422870) I had to install some VMs so I decided to try to use my certificate on them. In both KDE Neon and a fresh Archlinux installation it works! So this is clearly an issue of my computer and not a bug in kmail/kleopatra. Please close the issue and sorry for previous comment.