Bug 411954

Summary: Only ~ half of the messages are deleted
Product: [Applications] kmail2 Reporter: Fab Stz <fabstz-it>
Component: commands and actionsAssignee: kdepim bugs <pim-bugs-null>
Status: REPORTED ---    
Severity: normal    
Priority: NOR    
Version First Reported In: 5.9.3   
Target Milestone: ---   
Platform: Debian stable   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Fab Stz 2019-09-16 06:56:50 UTC 
In Kmail2, Debian buster (stable) I try to delete a lot of unread messages from a folder.
Let's say ~16000. But this is also reproducible with less, like 250 messages, or 100...

Selecting the messages in the folder (Filter unread + CTRL+A + Shift+Del)
 - Filter unread messages
 - CTRL+A to select all
 - Shift+Del to delete permanently (because it is too long and buggy to move them to the trash)

Then refresh the view :
 - click on Check Mail 
 - Select the Maildir ressource containing the folder (it is a mixedmaildir_resource )

About half of the emails have been deleted only and the other hald is still remaining in the folder as unread.

A new sequence of deletion will delete again only about half of the messages and so on...

System: Debian Buster (stable)
KMail 5.9.3
PIM/Akonadi 18.08.3