By default, your iCloud account is your iMessage to/from address. If you own an iPhone, your phone number is enabled for iMessage and, as far as I can tell, becomes the default to/from address on every device.

You can also attach extra email addresses to your iCloud/iMessage to use as your default to/from address. I added my personal email (at chartier.land) and set it as the default on all devices. I think it’s easier to identify and remember than some random string of numbers, especially when I’m messaging someone new.

To do this:

  • iOS: Log into appleid.apple.com with the iCloud account you use for iMessage. Under the Account > Reachable At section, click Add New and add any other email addresses you want to use with iMessage.
  • Mac: Open Messages and go to Preferences > Accounts > your iMessage account. In the Reachable At section, click Add New. You can also use the iOS method if you prefer.

**Important Note**: Any email addresses you attach to your iCloud/iMessage account are no longer eligible to become Apple IDs. However, you _can_ detach these addresses later at appleid.apple.com to make them eligible again.


To set an email address as your default from for new conversations:

  • iOS: Open Settings > Messages > Send & Receive, then make your selection in the Start New Conversations From section.
  • Mac: Open Messages and go to Preferences > Accounts > your iMessage account. Make your selection in the Start New Conversations From section.

Now, when you iMessage someone new, or start new conversations with existing contacts, your messages will come from your email address instead of a phone number. Bonus points: if you set an email address you actually use, now your contacts also know your email address for sending more email-y stuff.

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