Multiple Emails In Bcc? (documentation read)

1. Thanks for such a versatile plugin.
2. In the Additional Headers textarea, I entered – Bcc: [fr-email], [fr-email2], [fr-email2]

…and when that didn’t work, each bcc header\mailtag on a separate line.

Only the first email is receiving email – with and without Google Analytics code inserted.

I’ve read this support thread and this support thread and containing links.

Yet the CF7 v4.5 validator is displaying “The Bcc field value is invalid.” on the Edit Form page.

Any ideas on how to bcc to multiple email addresses would be GREATLY appreciated!

THANK YOU!