Mailchimp is the world’s leading email marketing automation platform. The integration for X-Cart 5 is available in the add-on named Mailchimp Integration with eCommerce Support. It is a powerful tool that replaces X-Cart’s built-in newsletter subscriptions feature and enables you to access some exciting e-commerce features like product recommendations, abandoned cart messages, purchase-based automation, and sales reports.
To start using Mailchimp in your store, make sure the Mailchimp Integration with eCommerce Support add-on is installed. For general guidance on the add-on installation, please refer to Installing Add-ons from X-Cart App Store.
The Mailchimp add-on requires the basic Newsletter subscriptions add-on to be installed and enabled. If both add-ons are used at the same time, the 'Newsletter subscriptions' add-on will be linked to Mailсhimp, and the subscriber email addresses submitted via the subscription form will no longer be stored to a list within X-Cart but will be handled via Mailсhimp, provided that your X-Cart store is connected to your Mailсhimp account via the add-on settings, and the Mailсhimp Integration is configured properly.
If at the moment of switching to Mailchimp, your store has a list of subscribers formed by the add-on Newsletter subscriptions, you should not expect these subscribers to be imported into Mailсhimp automatically. To use your existing subscribers with Mailсhimp, you will need to export them from your X-Cart store and import them into your Mailсhimp account. See https://kb.mailchimp.com/lists/growth/import-subscribers-to-a-list for information on how to import subscribers into Mailсhimp.