[kmail2] [Bug 420766] New: FROM field empty in some e-mails

[David de Cos]

https://bugs.kde.org/show_bug.cgi?id=420766

            Bug ID: 420766
           Summary: FROM field empty in some e-mails
           Product: kmail2
           Version: 5.14.0
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: david.decos at ehu.eus
  Target Milestone: ---

In the last days, some of the e-mails that I have received show an empty FROM
field in KMail. This may have coincided with upgrading to 20.04. Some remarks:

The e-mails don't actually have an empty FROM field. Other clients show them
correctly.

Those e-mails have certain things in common (which may or not be relevant):

- They have been sent from the same server (all e-mails being notifications
from comments in forums at my university's Moodle).

- In those e-mails, the FROM field has characters like "é", "ú", "ñ".

- In the e-mail source, the FROM field looks like this:
"=?utf-8?B?TWFyw61hICBMZcOzbiBHb256w6FsZXogKGVnZWxhIDIwMTktMjAtKHIpZW4=?=
=?utf-8?B?IGJpdGFydGV6KQ==?=" <actual e-mail address of the sender>


Thinking that those special characters might be responsible for the bug, I sent
myself an e-mail in which I manually changed my name from David to Dávid, and
included an attachment named "filé.txt". When I received it back, it didn't
show an empty FROM field like the other e-mails, but it did show something
interesting: "Dávid" was shown as "D?vid", and the attachment file name was
shown as "t?do.txt". Manually changing the encoding in the View menu didn't fix
this. I suspect this might be due to the same bug I'm reporting here, because I
have never noticed anything like this either. If it isn't, I guess I will
report a separate bug for that, because that's not the expected behavior
either.


SOFTWARE/OS VERSIONS
Kmail version: 5.14.0
KDE Plasma Version: 5.18.4.1
KDE Frameworks Version: 5.69.0
Qt Version: 5.14.2

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