About your @icloud.com, @me.com, and @mac.com email addresses
Depending on when you created your iCloud account, your iCloud email addresses and aliases may end with @icloud.com, @me.com, or @mac.com domains. Learn how these email addresses are granted.
Review these scenarios to see which one applies to you:
If you created an iCloud account on or after September 19, 2012, your email address ends with @icloud.com. Learn more about @icloud.com mail addresses.
If you created an iCloud account before September 19, 2012, or moved to iCloud with an active MobileMe account before August 1, 2012, you have both @me.com and @icloud.com email addresses.
If you had a working @mac.com email address as of July 9, 2008, kept your MobileMe account active, and moved to iCloud before August 1, 2012, you can use @icloud.com, @me.com, and @mac.com email addresses with your iCloud account.
In each case, you can sign in with your @icloud.com email address, your Apple ID email address, additional email addresses associated with your Apple ID, or your phone number.
If you created one or more email aliases for your account, be aware of the following:
You can change or delete an email alias, but if you delete an @mac.com or @me.com email alias, you can't add it back to your iCloud account.
You can't sign in to iCloud.com with an email alias. Sign in with your @icloud.com email address or the Apple ID that you use with your iCloud account.