You may want to update the unsubscribe settings in your Mailgun account, so follow these easy steps to turn the Unsubscribe feature on or off.
Step 1: Log in to your Mailgun account.
Step 2: Navigate to the dashboard on the lefthand side. Click Sending.
Step 3: Within the sub-menu, select Domain Settings. Here you can select from a drop-down list of your domain(s).
Step 4: Scroll down and next to "Unsubscribe" click Edit. You can then toggle on or off the Unsubscribe feature.
Step 5: Click Save to confirm your changes.