In the ‘Spam’ folder, I long-pressed (mobile) a singular spam email to bring up options - clicked the ‘delete all messages from sender’ option, and Yahoo proceeded to delete my ENTIRE ‘Inbox’ and ‘Sent’ folder. Within 10 seconds I noticed this was happening and pressed cancel. By this time, Yahoo had already deleted two weeks worth of emails, some of which were very important. I was able to restore my inbox from my ‘Trash’ folder. However all of the two weeks of important ‘Sent’ messages I use for reference, are permanently removed. Truly unacceptable and has an impact if there are important messages or information needed. Others need to be aware of this glitch.