On a COLD day, with no intention of venturing outdoors, I am beginning to delete some of, more than, ten thousand emails in my Inbox. I receive too too many… and don’t take time to delete unwanted…. I prefer to prepare blog messages, search clip art, work in the yard, and/or “climb the family tree.”
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Three Quarters & Counting 
I’ve been doing the same. Thankfully my email provider has a feature where you can click and get all the emails from that source, and delete the whole bunch with about 2 clicks, rather than going one by one. I spent several hours over a couple of nights awhile back but now it’s creeping back up again. Ugh.