We send out e-mail from firstname.lastname@example.org and email@example.com too many mailboxes. We end up in the address books of end users. There are services that ask to upload your address book in order to gain market share. We receive invites from those too.
Below we collect address in From lines we do not read because they are of this kind. You might also want to filter on those if you manage some kind of customer service mailbox.