[Bug 276105] New: Subject with non-ascii letters and without encoding displayed as "???"

[Murz]

https://bugs.kde.org/show_bug.cgi?id=276105

           Summary: Subject with non-ascii letters and without encoding
                    displayed as "???"
           Product: kmail2
           Version: Git (master)
          Platform: Unlisted Binaries
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: message list
        AssignedTo: kdepim-bugs at kde.org
        ReportedBy: MurzNN at gmail.com


Version:           Git (master)
OS:                Linux

Very often I receive mail from some services that don't contain encoding
description in subject. And non-ascii symbols are displayed like "???" in
message list.
Here is example: http://wstaw.org/m/2011/06/20/plasma-desktopcH2810.jpg

The Subject field in mail headers looks like this:
Subject: Âàø ñàéò íå ãîòîâ / Your site is under construction

In kmail 1.x I was successfully see those subjects when set fallback encoding
to cp1251, but in kmail 2.1 this option don't change the headers, but acts
normally on message body.

So in kmail 1.x I see this subject normally:
Ваш сайт не готов / Your site is under construction

But in kmail 2.x - like this:
��� ���� �� ����� / Your site is under construction

So, this is regression with decode mail headers from kmail 1.x to 2.x.

I can give you some more examples if you needs it and can test this bug in git
versions.

Maybe message subject decoding process in 2.x don't look to fallback encoding
and always use UTF-8 or Latin-1. Can you tell me some way how to fix this
problem?

Reproducible: Always

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