Please STOP the pop-ups telling me I've just deleted an email. Duh. I know I just deleted an email.
Stop with the pop-up windows while I'm trying to click on my emails. They're like some annoying person standing in front of a screen when you're trying to do something, or tugging on your sleeve and talking at you when you're busy. When I delete an email, I don't need a pop-up telling me I just deleted an email. I also don't need a pop-up thanking me for indicating that an email is spam (especially when Yahoo Mail's spam filter doesn't work reliably). Just get the pop-ups OUT OF MY WAY.

Hi there,
Thank you for your feedback. We include these confirmation popups as a failsafe for those moments when you mistakenly delete or move items. We feel that a momentary appearance of that notification is a fair trade off for having that safety net.
Having said that, some of these notifications were incorrectly positioned and temporarily blocking access to buttons. We’re glad to say we have corrected that.
Thanks again for your feedback,
Mail Support