Hi!
There is actually an open product suggestion to allow customization of emails sent from Tulip, which includes the point you have above: Request for Enhanced Email Functionality in Tulip Application . Check it out and make sure to vote to help influence priority of this suggestion!
In the meantime, you can try using something like the SendGrid connector https://tulip.co/library/connectors/sendgrid-connector/ to achieve some more customization here. Gio also wrote up some instructions here: People - Email for Users vs. Admins Only - #4 by Ethan
Another quick fix may be to include a specific user’s email address in the message: