You can add tags to iCloud e-mail addresses, to be able to sort messages with Mail rules, for example. To do this, use an address with your name, a plus sign (+), then a tag. For example: myname+tag@icloud.com. This also works with mac.com and me.com addresses.
With these tags, you can set up rules in Mail or another e-mail client to sort or redirect messages as desired.
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