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; we have to be able to:
- Handle and remove unsubscribes from your list automatically.
- Process bounce records.
- Report abuse and other information to ISP feedback loops. ISPs closely monitor how many unsubscribes occur. If an ISP sees too many, it can lead to deliverability issues for your account and other MailChimp users accounts.
Take a look at this article for directions on how to add our unsubscribe link to your campaign. If you've added the unsubscribe link to your campaign, but are receiving an error when trying to send, take a look at this article for troubleshooting tips.
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.