Sadly it's a daily thing, that’s about 4 months of buildup. I monitor a lot of servers and workstations so false positives are generated all the time. Using an Outlook rule the domain address they come from goes straight to a folder, I just quickly look over for any amber alerts and bin the rest daily.
I aim to keep my inbox empty. Only emails currently needing attention should be in there. I do this at work and at home. Meanwhile, my boss usually has about 5000 emails in his inbox and often needs telephoning to tell him you've emailed him.
There's a different set of rules for my personal email vs my professional email. I keep the professional email filed, sorted and the inbox should have nothing that hasn't just arrived. The personal,,,,,messy and full.