Quite often, I have to manually filter messages that kmail didn't finish. Sometimes some messages are marked by my bogofilter test, but the next filter that should move them to the trash folder is not executed, and I often find messages that should be moved to dedicated maillist folders in my inbox. Also, messages with attachments are sometimes not run throught my bogofilter test. I am using pop3 + maildir. Reproducible: Sometimes
Please try to get a filter log when such thing happens.
Please report how it works with KDE 4.10.1 or master.
This bug has only been reported for versions older than KDEPIM 4.14 (at most akonadi-1.3). Can anyone tell if this bug still present? If noone confirms this bug for a recent version of akonadi (part of KDE Applications 15.08 or later), it gets closed in about three months.
Just as announced in my last comment, I close this bug. If you encounter it again in a recent version (at least 5.0 aka 15.08), please open a new one unless it already exists. Thank you for all your input.