@FrMichaelFanous Good questions. Here is my general email setup and workflow for personal and professional communications.
Personal
I have two personal email accounts, one is a gmail “junk” account. This is the email I give out for all personal commercial transactions, web signups, etc. I never give out my true personal email account, which is an Apple iCloud email. To ensure that I receive the receipts, order status, and similar type of emails I create a gmail filter to forward those emails to my iCloud email address. Because I have done this over many years I seldom find myself needing to create new filters/rules at this point. I may end up doing so perhaps 8 to 10 times per year.
I immediately mark as spam any emails I receive that I consider junk/spam. Between my marking such emails and Google’s and Apple’s good spam filtering I seldom receive spam in my personal or professional inboxes.
Professional
For professional work, I have two email accounts—one for the college where I teach a graduate course and one for work. I follow the same process. I tend to get a lot of marketing emails. When these come in I skim them. If I’m not interested I mark them as spam. Occasionally, I’ll redirect an email to a colleague who may have an interest in it. When I do so, I copy the original sender and ask them to remove my email address.
Finally, I use an email client that has a consolidated inbox so that all unfiltered emails go to that inbox for processing but where I can also look at each account separately as needed. I vacillate between using Apple Mail and Spark.
Finally, I created an email rule for work related “global” emails, for example, “to all employees” or to “xyz association members”, etc. All of these are directed to separate folders. I check those folders once or twice a week for anything relevant. This keeps these “global” emails from showing up in my inbox.
I don’t sign up for many newsletters—I rely instead on blogs and RSS. Consequently, I have few of these to manage.
I don’t know if I’m answering your questions but I hope this is somewhat helpful. I just checked my inbox that consolidates all of my accounts, I have only five emails awaiting me despite the fact that I have 200 employees and 900 parents that I deal with, in additional to the college. This setup is working nicely for me.