Earlier quoted context omitted.
Alternatively, communications fatigue. How many emails does the average employee get with nonsense that doesn't apply to them? Oh cool, we have a new VP. Oh cool, that department had a charity drive. Oh cool, system I've never heard of is getting replaced by a new one, favourite of this guy I've never heard of. Add in the various spam (be it attacks or just random vendors trying to sell something). At some point, peo…
Everybody gets important emails, and it's literally part of their job to filter the wheat from the chaff. One of my benchmarks for someone's competency is their ability to manage information. With a combination of email filters and mental discipline, even the most busy inbox can be manageable. But this is an acquired skill, akin to not getting lost in social media, and some people are far better at it than others.
My #1 method of keeping my inbox clean, is unsubscribing from newsletters.