[kmail2] [Bug 368381] New: KMail 5.2.3 / Akonadi 16.04.3 shows no quota warnings

[Dennis Schridde via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=368381

            Bug ID: 368381
           Summary: KMail 5.2.3 / Akonadi 16.04.3 shows no quota warnings
           Product: kmail2
           Version: 5.2.1
          Platform: Debian testing
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: UI
          Assignee: kdepim-bugs at kde.org
          Reporter: dennis.schridde at uni-heidelberg.de

KMail 5.2.3 / Akonadi 16.04.3 provides me with no warning about exceeded quota
or failing uploads due to exceeded quota.

Reproducible: Always

Steps to Reproduce:
1. Exceeded IMAP quota on the server.
2. Fill folders with new emails (e.g. in the \Sent folder after sending
emails).

Actual Results:  
1. KMail stops uploading messages to the server, without notifying me that it
was unable to synchronise completely.
2. Deleting messages also becomes impossible, presumably because they are first
copied to \Trash, which will fail due to the exceeded quota.

Expected Results:  
KMail should display a warning when I am at e.g. 90% of my IMAP quota, a very
noticable error message when I am above 99% (i.e. when it becomes impossible to
store a reasonably sized email), and very noticable error messages for every
mail that cannot be uploaded to the server for whatever reason. It should also
mark such not-synchronised messages with a warning in the message list and
folders containing such messages (and folders containing folders containing
such messages) in the folder list.

I am using KMail 5.2.3 (the "version" list here in bugzilla allows me to select
only 5.2.1).
The server is running (response to the ID IMAP command from RFC 2971 [2]):
Cyrus IMAPD v2.4.17-Fedora-RPM-2.4.17-8.el7_1 d1df8aff 2012-12-01

Trojita displays a modal warning dialogue that "quota exceeded" (or similar).
This might be a message coming from the server, probably via the OVERQUOTA
response code from RFC 5530 [1], which is handled in
src/Imap/Parser/Response.{cpp,h} in the Trojita source code.

[1]: https://tools.ietf.org/html/rfc5530
[2]: https://tools.ietf.org/html/rfc2971

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