There are a couple different ways to handle unsubscribe requests. Which method is best for you depends on your email set up and the volume of unsubscribe requests you receive.
Adding an unsubscribe link in your email signature
You can create an unsubscribe link in your email signature using mailto:
Create a mailto: link. You can even use a mailto: link generator like this one. Your mailto: link will look something like this:
When you receive an unsubscribe request, we recommend that you use two tags for that purpose - Opt in and Opt Out.