I had used k9 for many years as there wasn't another email client nearly half as good or efficient  but the latest update has introduced a number changes that make it significantly slower to use. Bring back the """"""""mark all read"""""""" in notification pull down  and let us disable warnings such as confirmation required to""""""""mark all read"""""""" in main window. I think these two things will cost me half an hour a day managing my email on the go  that is 3 weeks in a year  I will check back in a few months if these are back. Update 5023 improved and fixed a few things  notification area still needs work  it's hard work trying to get the right message to show the options so you can delete or mark read when each has its own set of options and even Gmail doesn't split the options or message  change for the sake rather than good functional design  thanks for listening on the other things though.""
January 20 2017