This is quite an old thread, so the sceenshot I gave looks irrelevant now … but we did learn in this [Solved] thread No longer hearing sound for successful mail sound - #10 by swarfendor437 that even system notifications can be silenced.
This is quite an old thread, so the sceenshot I gave looks irrelevant now … but we did learn in this [Solved] thread No longer hearing sound for successful mail sound - #10 by swarfendor437 that even system notifications can be silenced.