I Saw your comment "You could accomplish this by putting your own unsubscribe links into the e-mails that you are sending out. Have the links go to a page you have defined and send their e-mail address along as a $_GET value in the URL. Once they arrive at your custom page, prompt them with a button to click, then use the sendy API to unsubscribe that user.
Basically what you are asking is possible but would take some custom work on your side. Could help you out if interested."
Can you please help me how exactly i can do this?
It will be a great help.
Looking forward for your reply.