Apple account email address disclosure via Mail app

This is a follow-up to my July 10 blog post, Apple Hide My Email bug, possibly related to disclosure vulnerability . Yesterday I happened upon a Mastodon post that inspired me to continue researching my Mac Mail app bug: curl can be used to send emails with smtp I have multiple email accounts, for example with my personal domain lapcatsoftware.com here and my business domain underpassapp.com , but…