Oh yes, we’re going there today! It’s inevitable; as long as you’re going to be in business, you’re going to get emails from people with an attitude!
You’re going to get emails from people demanding information from you without even asking nicely (like without even using basic manners like please and thank you!) and expecting the world from you.
You will get people telling you how you should be running your business and that what you’re doing right now is wrong.