Change the way Constant Contact updates Preferences. You need to provide a way for contacts to click on "update preferences" without receiving another e-mail.    Most other companies do this.   Have a popup appear or automatically go to your website with verification from the initial users e-mail.    Have your programmers send a uniquely generated code for every email sent out by Constant Contact.   When a user wants to update their preferences, send them to your website by autofilling the e-mail address and use the unique code plus the senders e-mail address to confirm their identity.  (Making sure its not an unsubscribe from someone forwarding the email)      It is such bad practice to have a second e-mail sent that people need to click on in order to update their subscription preferences.   Also rename your option: 1. "Update Subcriptions" (Mange your e-mail lists that this sender has you on) 2. "Unsubscribe from all Future e-mails from ......"   (You will not receive any more e-mails from this sender) ... View more