Are you wanting to disable, or enable, double opt-in for your Mailchimp email marketing subscribers? If so, then this tutorial will help.
Double opt-in is where once a contact subscribes to receive your email campaigns, they receive an email they must click. If your contacts don’t click the confirmation email from Mailchimp, you won’t be able to send them email marketing. If you want to disable double opt-in, watch this video showing how to enable or disable double opt-in in Mailchimp.