Integration with MailChimp

First of all, if you don’t have an account, register one on MailChimp
Now go to http://admin.mailchimp.com/account/api/ and create a new API key with the related button, as you can see below.

Product type "Bundle"

 

After creating it, copy and paste the key in the “MailChimp API Key” field that you find in the plugin settings dashboard.

MailChimp API Key - Mailchimp panel

MailChimp API Key - Plugin panel

If no mistakes were made, validation will be done correctly and you will see the information about the linked MailChimp account.

MailChimp API Key Validated