Here is a quick guide on how to do it (if you already have an active Mailchimp account, start with the step #4.)
When this box is unchecked, new users are not added to Mailchimp so you can uncheck it to temporarily stop subscriptions. Then follow the next steps:
If you already have confirmed bookings in the Hotel Booking plugin, all those client email addresses are automatically added to the list of contacts in Mailchimp when you synchronize e-commerce actions to Mailchimp.
To enable this functionality, check the following box: “Subscribe eCommerce customers” and sync it with the Mailchimp lists (it should be synced automatically when you connect the list).
For example, for Hotel Booking, you can create regular emails campaigns, such as:
If you want to use Mailchimp email notifications instead of the ones provided by Hotel Booking (or turn off just some of them selectively), don’t forget to turn off the needed types of emails via the Hotel Booking → Accommodation → Settings → Customer emails and set them up in Mailchimp.