[Akonadi] [Bug 367708] New: [Exchange 2013] Error on saving sent mail to IMAP folder: A000007 BAD Command Argument Error. 12

[Martin Steigerwald via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=367708

            Bug ID: 367708
           Summary: [Exchange 2013] Error on saving sent mail to IMAP
                    folder: A000007 BAD Command Argument Error. 12
           Product: Akonadi
           Version: 16.04
          Platform: Debian unstable
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: IMAP resource
          Assignee: chrigi_1 at fastmail.fm
          Reporter: martin.steigerwald at teamix.de
                CC: kdepim-bugs at kde.org, vkrause at kde.org

After I sent a mail I receive the notifications:

Speichern fehlgeschlagen, die Serverantwort lautet: A000007 BAD Command
Argument Error. 12

sometimes also after that:

Die Verbindung zum Server ist abgebrochen.

The mails are saved nonetheless.

Setup is Akonadi/KMail 4:16.04.3-2 from Debian unstable with Exchange 2013
behind Nginx proxy. Akonadi/KMail is configured to store sent mail in IMAP
folder on that account.

Reproducible: Always

Steps to Reproduce:
1. Have Exchange 2013, probably behind Nginx proxy.
2. Setup IMAP and SMTP.
3. Set it up to store sent mails in folder "Sent Items."
4. Send a mail.

Actual Results:  
After I sent a mail I receive the notifications:

Speichern fehlgeschlagen, die Serverantwort lautet: A000007 BAD Command
Argument Error. 12 => Saving failed, server answer is: …

sometimes also after that:

Die Verbindung zum Server ist abgebrochen. => Connection to server aborted.

In ~/xsession-errors I also get:

kdeinit5: Got EXEC_NEW '/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/smtp.so'
from launcher.
kdeinit5: preparing to launch
'/usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/kio/smtp.so'
Cannot pause an inactive timer
"Der Name des Hosts ist keiner aus der Liste der für dieses Zertifikat gültigen
Hosts" => THe name of the host is in not from the list of the hosts that are
valid for this certificate.
log_kimap: We asked for UID but the server didn't give it back, resultingFlags
not stored.
log_imapresource: Flag append failed:  "Speichern fehlgeschlagen, die
Serverantwort lautet: A000007 BAD Command Argument Error. 12 " => Saving
failed, server answer is: …
log_imapresource: Flag remove failed:  "Speichern fehlgeschlagen, die
Serverantwort lautet: A000008 BAD Command Argument Error. 12 "
Database "akonadi" opened using driver "QMYSQL"

And sometimes instead:

log_kimap: We asked for UID but the server didn't give it back, resultingFlags
not stored.
log_imapresource: Flag append failed:  "Speichern fehlgeschlagen, die
Serverantwort lautet: A000011 BAD Command Argument Error. 12 "
log_imapresource: Flag remove failed:  "Die Verbindung zum Server ist
abgebrochen." => Connection to server aborted.
"Der Name des Hosts ist keiner aus der Liste der für dieses Zertifikat gültigen
Hosts"
kdeinit5: PID 8816 terminated.
kdeinit5: PID 8822 terminated.

(not sure whether the last two are related)


Expected Results:  
No error message and no occasional connection abort.

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