Do you want to give some quick advice just before arrival, or remind the guest you also have your own restaurant? You can with a pre-arrival mail. Or if you want to thank them for their visit after departure, you can with an automatic post-departure mail. If you like, you can even use it to send a post-arrival mail after check-in. Just to check up with the guest that everything is going smoothly. This way you can act up on their specific needs and shift bad memories into warm ones and good reviews.
Of course you can easily modify those e-mails to your own look & feel and add personalistion so that the guest will experience a direct contact. Just one easy set-up, that's all you need. After that, everything will run itself. What more do you want?