Comment 0 for bug 988866

If the user's agent_config_akonadi_mailfilter_agent_changes.dat gets corrupted, the mailfilter_agent becomes unusable. There is, however, a way to recover from this.

RELEASE NOTE:

The new version of the KDE PIM component Kmail in 12.04 introduced a new element to handle mail filtering. In some cases the configuration information for this element, akonadi_mailfilter_agent, can get corrupted. If this happens, the akonadi_mailfilter_agent will stop filtering mail (e.g. messages already sent stay in the outbox) and start to consume large amounts of CPU and RAM. Enough that the entire system may become sluggish. Eventually it usually crashes (and will crash again if restarted). In order to fix this problem, the corrupt configuration file has to be removed (it will be automatically regenerated when things are started again). To accomplish this do the following steps:

1. open a terminal window (using konsole for Kubuntu, other applications for other flavors).
2. cd ~/.config/akonadi
3. akonadictl stop
4. wait until you get a notification that akonadi is fully stopped
5. rm agent_config_akonadi_mailfilter_agent_changes.dat (this removes the corrupt file)
6. akonadictl start

That should restore correct behavior