After upgrading to openSUSE Leap 15.1, kmail still works fine, good ! Yet I have been puzzled by the 9,999+ label over the icon in the task bar. This is actually the unread email count newly added by https://phabricator.kde.org/D9841 This is useless for 9999+ unread mails (a mailing list I'm either searching in, or filtering on previously read messages); but even if the count was meaningful, I would much prefer to hide this unread count when not in the task of consulting mails. Is there any way to turn this feature off ? (none found yet) KDE Plasma Version: 5.12.8 KDE Frameworks 5.55.0 Qt 5.9.7 (built against 5.9.7)
KMail settings / Appearance / General tab. There's a "show unread email in taskbar" box.
It's probably not available in your version however.
Indeed, not there yet. Good to know it is configurable in newer versions, thanks !
Specific folders, e.g. the one holding a large mailing list, can also be excluded from the new mail count: Menu bar - Folder - Folder Properties - General tab Turn off "Act on new/unread mail in this folder".