Hi printers,
That could be due to one of a few issues. I’d say start by looking at our documentation for this here: http://doc.fivestarplugins.com/plugins/restaurant-reservations/user/faq#no-emails
If it still isn’t working after verifying the elements mentioned there, you could try looking into using a plugin like WP Mail SMTP to route your emails via your real email address/server. It might just be that the emails are being blocked/flagged/marked as spam because the recipient’s email provider is identifying them as coming from an auto mailer.