Bug#672992: kmail: Mailing lists are not resolved

[Markus Huber <markus.huber@yahoo.de>]

Try this set of commands and relogin into KDE:

akonadictl stop
qdbus org.kde.NepomukServer /nepomukserver quit
kbuildsycoca4 --noincremental
rm ~/.kde/share/apps/nepomuk/repository/main/data/virtuosobackend/*
nepomukservicestub nepomukstorage
akonadictl start

Source of information:
http://socceroosd.blogspot.com/2010/02/kubuntu-karmic-kde-44-and-nepomuk.html

Also make sure in your KDE systemsettings that the nepomuk service is 
activated.

I had the same problem when using KDE 4.4 but since KDE 4.7 it never occured 
again.

Regards,
Markus Huber