If you experience the problem that KMail / Kontact 4.9.x are not doing address autocompletion in the composer window, you can edit ~/.kde/share/config/kpimcompletionorder (or ~/.kde4/share/config/kpimcompletionorder on some systems) and add [General] UseNepomuk=true Beware: This is only a workaround and can cause lock-ups of the composer window. Instead of using nepomuk, kontact should be using akonadi …
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