[kmail2] [Bug 434636] New: Problem with initialization of DKIM "plugin"

[David C. Bryant]

https://bugs.kde.org/show_bug.cgi?id=434636

            Bug ID: 434636
           Summary: Problem with initialization of DKIM "plugin"
           Product: kmail2
           Version: 5.16.2
          Platform: Gentoo Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: config dialog
          Assignee: kdepim-bugs at kde.org
          Reporter: davidbryant at gvtc.com
  Target Milestone: ---

SUMMARY
Configure KMail --> Plugins --> DKIM Checker works OK until KMail is restarted.
Then it breaks.

STEPS TO REPRODUCE
1. Open Configure KMail --> Plugins --> DKIM Checker Configuration dialog
(click the button).
2. Make sure "Enable DKIM Support" is *not* checked; close dialog, exit KMail.
3. Restart KMail, then check the "Enable DKIM Support" option.
4. DKIM checking starts working as advertised, generally reporting either "DKIM
valid" or "DKIM not signed" (when DKIM header is not present).
5. Exit KMail and restart the program.
6. Now DKIM checking is broken: every formerly valid signature is now reported
to be invalid.

OBSERVED RESULT
DKIM Checker only works until KMail is restarted. Then it fails. The only
workaround I have found is to change the configuration file ("Not Enabled"),
shut KMail down, then restart KMail and change the configuration file again
("Enabled").

EXPECTED RESULT
If the DKIM Checker is turned on, it should still function correctly when KMail
is stopped and re-started. Something is not being initialized correctly when
KMail starts up. Reconfiguring the DKIM Checker forces proper initialization
once and once only.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.77.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
This may be related, indirectly, to bug #204712. I hadn't even noticed this
feature of KMail until recently, when I added new documentation for the
"Plugins" configuration page. I discovered the bug when I was experimenting
with DKIM Checker so I could write some documentation for this feature.

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