MailChimp integration
Mautic can send leads to MailChimp upon some lead's action or when it gain some point limit.
Version notes
For Mautic 1.2.2 and older, an MailChimp app has to be created and the authentication is made via oAuth2. Client key and secret credentians are needed for authentication. Also SSL (https) connection is required.
For Mautic 1.2.3 and later, the authentication has been changed to the API key. This documentation covers this option. This plugin is backward compatible. If the client ID is filled, the plugin will use oAuth2. If the client ID is empty, the plugin will let you insert the API key.