Going through my main email address, and those that I signed up for that send emails back with a different sender address so it sounds like I've gotten mail from an unrecognizeable sender are the bane of my existance.
I'm just grouping things together to shove into folders for easy sorting, but there's a dozen different sender addresses that are like "Dave" that turn out to be from that one clothing store I bought a shirt from in 2018 and thought I'd sign up incase I see anything else I like.
Plot-Twist: I didn't, their selection has sucked, that shirt was a diamond in the rough and now its been eaten by moths.