If you send a message through your Mailchimp Inbox that may be considered a commercial or marketing communication under applicable law, you can use the Opt-out Footer to comply with applicable law and provide your Contacts with the means to unsubscribe from one-to-one messages sent through Inbox.</li> </ul> </li> </ul> Best Practices <p>As a marketing platform with millions of customers all over the world, we feel it’s our responsibility to be extra vigilant in preventing abuse of our services to protect both our customers and their contacts.