Okay, through some trial and error I think I see that the Unsubscribe link records the unsubscribe request but in subsequent mailing to the list, that unsubscribed email address was again sent an email. Unsubscribe did not work? I would have anticipated that an email marked unsubscribed (unsubscription) would be automatically skipped? What is the intended function? Is there a setting to tell MaxBulk Mailer to skip these records in future mailings?