It goes without saying that if you do not make it easy for subscribers to say goodbye, they are more likely to report you as spam. But you can say goodbye in a way that provides value-- both for you and for your subscriber.

Don’t just do the terse "thank you, you are now unsubscribed" confirmation page. Treat your unsubscribe page more like a landing page: give subscribers options to manage their subscriptions, update their email addresses, discover your other email programs and explain why they are leaving.

Sample unsubscribe page