Use email aliases on iCloud.com
An email alias is an email address that conceals your primary email address from a recipient. An alias can help you manage the email you receive and monitor the sources of unwanted messages. You can both send and receive email from an email alias. With iCloud Mail, you can have up to three active email aliases.
You can’t use an alias to sign in to iCloud.com, and you can’t use an alias to create a separate Apple ID. An alias cannot be converted to a primary account.
Note: If you had five MobileMe email aliases when you moved your account to iCloud, you retain the five aliases. However, if you delete one of your five aliases, you can’t create a new one to replace it.
Create an email alias
In Mail on iCloud.com, tap the Action pop-up menu
in the sidebar, then choose Preferences.If you don’t see the sidebar, see Show or hide the sidebar in Mail on iCloud.com.
Tap Accounts, then tap “Add an alias.”
Provide the requested information:
Alias: The text you provide becomes the email address (alias@icloud.com). An alias must contain between 3 and 20 characters.
Full Name: The name you provide appears in the From field of the messages you send.
Label: iCloud Mail uses the label to categorize messages sent to the alias. Alias labels appear only in Mail on iCloud.com.
Label Color: Select a color for the label.
Tap OK, then tap Done.
Change alias preferences
In Mail on iCloud.com, tap the Action pop-up menu
in the sidebar, then choose Preferences.If you don’t see the sidebar, see Show or hide the sidebar in Mail on iCloud.com.
Tap Accounts, select the alias in the Addresses list, then do any of the following:
Change the Label: Enter a new label in the text field. Alias labels appear only in Mail on iCloud.com.
Choose a new color for the label: Tap a Label Color option.
Change the Full Name: Enter a new name in the text field.
Tap Done.
Turn off, turn on, or delete an alias
You can turn an email alias on or off at any time. You can also delete email aliases that you no longer want to use. While turning off an email alias is temporary, deleting it is permanent. When an alias is turned off or deleted, email sent to that alias is returned to the sender.
In Mail on iCloud.com, tap the Action pop-up menu
in the sidebar, then choose Preferences.If you don’t see the sidebar, see Show or hide the sidebar in Mail on iCloud.com.
Tap Accounts, select the alias in the Addresses list, then do any of the following:
Turn off an alias: Select “Disable alias.”
Turn on an alias: Deselect “Disable alias.”
Delete an alias: Tap Delete.
Tap Done.
Note: You can’t delete or turn off a primary @icloud.com email address.
Set a default address to send from
In Mail on iCloud.com, tap the Action pop-up menu
in the sidebar, then choose Preferences.If you don’t see the sidebar, see Show or hide the sidebar in Mail on iCloud.com.
Tap Composing, tap the “Set a default address” pop-up menu, then choose the address you usually use.
In the list of addresses, select the ones you want to be able to send from in iCloud Mail.
The selected addresses appear in the From pop-up menu when you create a new message. See Write and send email in Mail on iCloud.com.
Select addresses to send from on your device
On your iOS or iPadOS device, do one of the following:
On iOS 12 or later or iPadOS: Go to Settings > Passwords & Accounts > iCloud. In the Advanced section, tap Mail, then turn on the addresses you want to use in “Allow sending from.”
On iOS 11 or earlier: Go to Settings > Accounts & Passwords > iCloud. In the Advanced section, tap Mail, then turn on the addresses you want to use in “Allow sending from.”
On your Mac, open Mail, then choose Mail > Preferences. In the Composing pane, click the “Send new messages from” pop-up menu, then choose the address you usually want to send from.
On your Windows computer, do one of the following:
In Outlook 2010, 2013, or 2016, choose File > Info > Account Settings > Account Settings, click the Email tab, select the address you usually want to send from, then click “Set as default.”
In Outlook 2007, choose Tools > Account Settings, click the Email tab, select the address you usually want to send from, then click “Set as default.”