To check for subscribe or unsubscribe requests:

Select the group you want to remove unsubscribed addresses from, or select "View All Addresses" to remove unsubscribed addresses from every group.

Choose Addresses > Scan Incoming Mail...

Enter the address, user name, and password for the mail server you want to check. Direct Mail currently only supports POP3 servers.

Click the Subscribe or Unsubscribe tab.

Check the "Look for subscribe requests" or "Look for unsubscribe request" checkbox.

Click Scan.