To get started with Mailchimp, first click to add a Mailchimp account in your zap.
Next, you'll name this Mailchimp account. Note: This name is only for identifying the account inside Zapier, it will not automatically try to add a specific Mailchimp account.
You should then get a pop-up window from Mailchimp asking you to log-in to authorize the connection between that Mailchimp account and Zapier.
After logging in, you'll get sent back to your zap where you now have your Mailchimp account connected!
You'll never want to actually type an actual email address into the forms Zapier gives you. The magic of Zapier is pulling data from the trigger service and putting that data into the forms via our handy variable insertion:
If your Mailchimp list has double opt-in enabled, you won't see any subscribers added by your zap until after that new subscriber clicks through the double opt-in email. However, your task history will show a successful task immediately, even if the subscriber does not confirm the double opt-in email.
Mailchimp checks for duplication based off email address, so any email addresses your zap is trying to add that already exist in that list will fail.
If you are seeing this error it means you don't have interest groups enabled. See this tutorial on how to get enable it. This may also be the case if you get this error: "You must specify a apikey value for the listSubscribe method"
If you use Google Apps to access your Mailchimp account, you'll need to set up a username and password with Mailchimp. Here's a link to their guide on doing so: http://kb.mailchimp.com/integrations/other-integrations/integrate-google-apps-with-mailchimp
After you have a username and password, you'll be able to log into your Mailchimp account when trying to connect it to Zapier to ensure that connection is made.