[kmail2] [Bug 430721] New: some attachments are not shown with setting header/standard in eMail window

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=430721

            Bug ID: 430721
           Summary: some attachments are not shown with setting
                    header/standard in eMail window
           Product: kmail2
           Version: 5.15.3
          Platform: Debian testing
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: UI
          Assignee: kdepim-bugs at kde.org
          Reporter: pugorg at yahoo.de
  Target Milestone: ---

SUMMARY
When view/header/standard is configured some attachments are not shown in the
email window, so that there is no indication of an attachment there. Switching
to view/header/decorative shows the attachments in the same email window's
header section.

Example code for not shown attachment with standard header ([UUID] is a
placeholder):
--Apple-Mail=_[UUID]
Content-Disposition: inline;
        filename="filename.pdf"
Content-Type: application/pdf;
        x-unix-mode=0644;
        name="filename.pdf"
Content-Transfer-Encoding: base64

[code]

Example code for shown attachment with standard header:
--multipart_alternative.123456789--

--multipart_mixed.987654321
Content-Type: application/pdf
Content-Length: 42000
Content-Disposition: attachment; filename="filename.pdf"
Content-Transfer-Encoding: base64

[code]

OBSERVED RESULT
No indication of an attachment in the email window.

EXPECTED RESULT
An attachment is shown in standard view in all emails

SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.74.0
Qt Version: 5.15.2

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