I want to delete my existing iCloud email address and replace it with a new one. My Apple ID is a hotmail address which I do not want to change. I have been getting too much rubbish on my iCloud email, so I just want to delete it and replace with a new one.
Rather than change it, you could just redirect unwanted emails to a fake address, which would then bounce.
I don't know whether this makes them eventually give up sending it, but you never see it again, it's as though it never happened.
I started getting a lot of spam from some random online dating service which I dealt with in this manner.
Start at https://www.icloud.com/#mail & from the gear icon at the bottom select Rules...
Add the spam senders & redirect to something random & unlikely to exists - email@example.com etc
Bye bye spam.
Do you want to delete it and replace a new one?
This page is about your question. You mail is hotmail instead of @me.com, @icloud.com or @mac.com. (Apple provides these.)
So, you can see the middle part of this article about "the third party email", using ctrl+f to search "third party". You can know how to do it.