MailChimp Auto-Subscribe is a popular Joomla plugin. which allows you to automatically add registered users to your Mailchimp list. The user is added in the background. You can also send confirmation emails. Main functions. Automatic subscription during registration, display of basic information about users, easy plugin installation, support for basic components that support joomla registration, full compatibility with EngageBox, consent field in the registration form, separate lists for each language and other functions.