Add customers to your MailChimp lists.
MailChimp is the email newsletter software we use at iThemes and as such is one of our recommended and preferred vendors for email newsletters.
With the MailChimp Add-on, you can add your customers to your MailChimp e-mail lists during the purchase process.
Just enter your Mailchimp API key and choose which MailChimp list you want to use. It’s as simple as that.
You can also customize the sign-up message and choose to enable double opt-in.