[kmail2] [Bug 320968] New: Unknown shown in Sender TO and CC fields instead of names

[Emre]

https://bugs.kde.org/show_bug.cgi?id=320968

            Bug ID: 320968
           Summary: Unknown shown in Sender TO and CC fields instead of
                    names
    Classification: Unclassified
           Product: kmail2
           Version: 4.10.3
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: NOR
         Component: message list
          Assignee: kdepim-bugs at kde.org
          Reporter: erenoglu at hotmail.com

I'm using kmail2 with local IMAP server which has my archives (Dovecot). 
I can see that some of the "sent messages" are not showing headers correctly.
There are no names or addresses listed in the TO, FROM and CC fields in the
message preview pane.
When I look into the message source, I can properly see those fields and the
names. 
Note that the server is Exchange. Therefore, not all recepient/sender names
have "email addresses" appended to them. Sometimes, there's only names. 
For example, in an email that I see with "Unknown" as sender name and no names
shown in headers in preview pane, if I look at the source of the message, I can
see:

Status: RO
From: "ERENOGLU, EMRE (EMRE)" <MAILER-DAEMON>
Subject: About our meeting
To: SURNAME, NAME (NAME)
Date: Sun, 30 Dec 2012 20:12:11 +0000

or another one:
Status: RO
From: "ERENOGLU, EMRE (EMRE)" <MAILER-DAEMON>
Subject: RE: Other topic
To: Surname1, Name1 (Name1); Surname2, Name2 (Name2)
Cc: Surname4, Name4 (Name4); Surname3, Name3 (Name3)


Reproducible: Always

Actual Results:  
Unknown is shown although the headers seen in message source contain names.

Expected Results:  
Show correct names in the headers

Not all messages are like this. For example, this one (message source) shows
correctly:

From: Emre Erenoglu <emre.e at mycompany.com>
User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130510
Thunderbird/17.0.6
To: "Surname1, Name1 (Name1)" <name1.surname1 at company.com>
CC: "Surname2, Name2 (Name2)" <name2.surname2 at company.com>

Note that there are no local or LDAP addressbooks configured in this system.

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