MailChimp is built for email marketing and as an ESP, we are required to enforce spam laws. This means you must include an unsubscribe link in your campaigns. A spotty unsubscribe process can impact deliverability rates, and we want to make sure your emails reach their recipients.

It's not just that an unsubscribe link is a requirement of the CAN-SPAM act. As a bulk delivery service, ISPs require us to manage your lists in a specific way, so we have to be able to:

We have to do all of this automatically and accurately. Since sending an email to someone who has previously unsubscribed is a violation of CAN-SPAM, we have to make sure the unsubscribe process is being handled automatically for all of our users. Because of this, our Terms of Use require that our link be used in all MailChimp campaigns.

You can add our unsubscribe link to your campaign in the Campaign Builder and custom templates. Take a look at our unsubscribe troubleshooting article if you run into a problem. 

If you're looking to send one-to-one sales emails or transactional messages you probably don't want to include an unsubscribe link. For those cases you'll want to take a look at our CRM integrations for sales emails or Mandrill for transactional emails.

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