Apple has a nice feature called Hide My Email. But sometimes I need to original an email and send it out. In my case, I had a debit card. I created a Hide My Email address and used it during registration. I now need to communicate with them via email and they can not find my account because the email I send is from a different address. This has come up a few times actually.
The Mail app on macOS (and iOS) allows only a selection of email addresses to send from. As far as I know, it doesn't allow you to just type in an address or use one of the Hide My Email addresses.
The Mail app on macOS (and iOS) allows only a selection of email addresses to send from. As far as I know, it doesn't allow you to just type in an address or use one of the Hide My Email addresses.