This is a never-ending, thankless and demoralizing task.
The amount of time wasted sorting through real email and spam seems to grow. Then the real emails have different priorities.Everyone forgets to reply to some emails too.
I have developed a method of Email Inbox Management for over 8-years and you can benefit from this.
If we go forward together, all you will have to do is answer the most vital of your emails once a day and the less important emails once every 3 days [I send them a standard reply that you’ll be getting back to them on a given date]. This means you would then only need to attend to your email inbox 8 times a week and only deal with the emails that come from me. Nothing will ever be forgotten or missed again.