Version: (using KDE 4.0.83) Installed from: Ubuntu Packages Kmail has some marks / tags for email messages: "Friend", "Business", "Later". Please add the ability to have custom, user-defined tags. Thanks.
You can configure tags in Settings->Appearance->Message tags
Thank you Thomas, I completely missed that! I suggest that this be moved to a more intuitive location, however. As this is a configuration option that the user may have to use often, and it is not intuitively related to anything else in the Settings dialog, I suggest that Message Tags have it's own top-level menu item.