Booking Manager enables you to send Newsletters directly from Booking Manager by integrating it with Mailchimp. MailChimp helps you design email newsletters and track your results. It's like your own personal publishing platform.
Creating newsletter signup forms
Mailchimp gives you the posibility to create signup forms where people can signup for the newsletter.
In order to do that you need to login to your Mailchimp account, click on Lists (1.) > Signup Forms (2.) and select the correct list (3.)
Once you enter Signup form (4) you can Build it, Design it and Translate it (5). choose Subscribe (6) and share it with the code under Signup form URL (7)
This is example