When I was in academia, my inbox was like 40% emails like “publish your next article here”, " you are invited to conference x", “your article on x”. You get a lot of spam that is generated with text snippets from your work, so it is very targeted. You just have to start ignoring most emails. The other 60% is just work convos from known sources, so it is very easy to separate the two. Or kind of… you could still get an invitation or a review request, but you sort of know peoples names and names of joirnals. I guess its just hard to get by this.