Ability to Send Form Submissions to External Email Address Removed

No clue if you found a solution to this yet but, if you’re a GSuite/Workplace user, it may be possible to use the Default Routing email function to automatically redirect the email from one address to another. We use this all the time to provide custom email addresses, but funnel them into a single mailbox in our helpdesk. You can also customize subjects, mail headers, etc. for additional features. Just a thought, but I have not tested it in this exact scenario. Good luck!