You can change the label for an alias.
Remove an Alias from Outlook.com
An iCloud email alias allows people to send email to your iCloud account without ever having to divulge your true email address.
Aliases are not accounts and do not have their own password. Any messages to the alias will be delivered to the main inbox alongside messages to the primary address, and can be accessed in the usual way. If you are signed into iCloud on your Mac or device and have Mail enabled such messages will appear automatically.
Are you sure? If you remove an alias that's an email address from a Microsoft domain (like @hotmail.com, @live.com, @outlook.com, or @msn.com), you're permanently deleting the alias and it can't be associated with any Microsoft account again.
Helpful answers. @iCloud.com, @mac.com, and @ me.com aliases can't be deleted. Your Apple ID will allow you access to iCloud.com and iCloud in general. in the sidebar, then choose Preferences.
Apple's iCloud service lets you create and delete these additional identities at will. That's a bit harder to do — if not impossible — with your primary email account. Aliases are also useful for filtering, since you can actually separate messages sent to these emails into different mailboxes.
Are you sure? If you remove an alias that's an email address from a Microsoft domain (like @hotmail.com, @live.com, @outlook.com, or @msn.com), you're permanently deleting the alias and it can't be associated with any Microsoft account again.
All email and contacts for this alias will be immediately deleted from the server and cannot be recovered, and you will not be able to access Microsoft services such as Xbox, Skype, and OneDrive if they use that alias.
Turn off an alias: Select “Disable alias.” Turn on an alias: Deselect “Disable alias.” Delete an alias: Click Delete.
To uninstall Silverlight:
Apple doesn't let you change an Apple ID's email account login to any other address if it ends in icloud.com, mac.com, or me.com. Apple does let you add email aliases that end in @icloud.com, but these aliases can only receive email. They can't be converted into an Apple ID login.
You can have up to three aliases connected to your primary iCloud.com account. And, as we mentioned, you can delete them at will. (If you do device to do so, keep in mind that you may not be able to get the same address back.) In the Accounts tab, you can also disable select aliases.
Changing an iCloud Email Alias You can delete and re-create an iCloud email alias, but you have to use the same account to which the alias belongs to. Between deletion and recreation is a seven-day delay. If you delete an old me.com or mac.com alias, it cannot be re-created.