It’s worth setting up some rules on your inbox, so any guff that might need to be referred to, gets dumped into a sub folder automatically, then basically scroll through and immediately delete any other guff on your return. As you’re scrolling down doing a purge, flag anything that looks serious, and leave non serious items un flagged. A skim read/preview is all it takes to do this.
Then you’re just left with emails that are directly relevant to you.
I have a zero inbox policy, you never actually have zero, but it’s rare I’ve more than 30 items which I can then easily prioritize with flags.
It makes me shudder when colleagues have 1000plus emails sat in thier inbox..delete it, file it for reference into a suitably titled sub folder, then you can actually see the wood for the trees.