[kmail2] [Bug 455860] New: Kmail is sending read receipts, despite setting it not to do so

[acidrums4]

https://bugs.kde.org/show_bug.cgi?id=455860

            Bug ID: 455860
           Summary: Kmail is sending read receipts, despite setting it not
                    to do so
           Product: kmail2
           Version: 5.20.2
          Platform: Gentoo Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: MDN
          Assignee: kdepim-bugs at kde.org
          Reporter: acidrums4+stuff at gmail.com
  Target Milestone: ---

SUMMARY
Since 5.20 or maybe even before, kmail is sending read receipts despite setting
it not to do so (both with "ignore" and with "ask each time" an clicking
"ignore"). Not sure if this comes down to Gmail, as it's the backend for the
email accounts I have to use, but the very second I open an email with a read
receipt, kmail sends it.

STEPS TO REPRODUCE
1. Set kmail to ignore read receipts (Settings->Security->Message Disposition
Notifications->Send Policy->Ignore (or ask)
2. Open an email with a read receipt (and click "ignore" if you set "ask" in
the previous step)

OBSERVED RESULT
Kmail will send the read receipt immediately, no matter what setting you have
in the first step.

EXPECTED RESULT
Kmail will never send any read receipt if you set "Ignore" (or "Ask" and you
click "ignore" in an email with a read receipt).

SOFTWARE/OS VERSIONS
Linux: Kernel 5.18.0
KDE Plasma Version: Plasma 5.25.1
KDE Frameworks Version: 5.95.0
Qt Version: 5.15.4

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