Notification Email to address in a field, not a user

Not documented (I don't know why), but easy peasy.

Just make an Email Notification of Type Open. (You only get to choose the type when creating one, not editing), and list the fields each containing a single email address (not a comma or semi separated list).  I like to list them vertically in the email who box.

There is no helper to select fields so type carefully.  But I think it will validate that that each is a  valid field name for an email field type,

[non user email 1]

[non user email 2]

[non user email 3]

[internal user email 1]