[Akonadi] [Bug 432174] New: Certificate dialog loops when cancelled (expired certificate)

[Grósz Dániel]

https://bugs.kde.org/show_bug.cgi?id=432174

            Bug ID: 432174
           Summary: Certificate dialog loops when cancelled (expired
                    certificate)
           Product: Akonadi
           Version: 5.16.1
          Platform: openSUSE RPMs
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: IMAP resource
          Assignee: kdepim-bugs at kde.org
          Reporter: groszdanielpub at gmail.com
  Target Milestone: ---

SUMMARY
If there is a problem with a certificate (such as it's expired), and I cancel
it, it appears again and again, in an infinite loop. It can only be dismissed
by accepting the certificate.

This issue has existed since at least 2014 (Bug 333762), that one has been
closed as unmaintained.

STEPS TO REPRODUCE
1. Use an IMAP server with an expired certificate.
2. Click Cancel in the certificate dialog.

OBSERVED RESULT
The dialog appears again. Even if you wait without clicking any button, new
instances of the dialog keep appearing again and again.

EXPECTED RESULT
The dialog should disappear, and the IMAP resource should be disabled as long
as it has the same certificate that has already been declined.

If periodic mail check is enabled, it should probably keep trying according to
the interval, but not show the dialog again as long as the certificate is
identical to the one that the user has refused to accept. On a manual mail
check, the dialog should probably pop up again (once), allowing the user to
accept it.

SOFTWARE/OS VERSIONS
openSUSE Tumbleweed 20210121
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.77.0
KDE Applications: 20.12.0
Qt Version: 5.15.2

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