Version: (using KDE KDE 3.3.0) OS: Linux Most unexperienced users are not familiar with the possibility to press CTRL and select several messages in order to have to click the toolbar-button to mark theses as spam. Thus this should be moved right next to the subject-line, as it is in Mozilla. There has been a patch recently to add a new column for spam (and other things). This should be used to allow marking a message as spam right next to it. Adding a shortcut would also be very useful
Shortcuts for the filter actions are possible in CVS HEAD (KDE 3.4). So you can define a keybinding for "classify as spam" and sort your mail via keyboard which will be the fastest way IMO. You can also show the ham/spam status column in that version. But this column is not active like in Mozilla, i.e. clicking there does nothing. If you want that feature, please report a new wish for exactly this. I wonder if that "click into status column" feature is specific for spam classification or more general.