JangoMail has established a feedback loop with Microsoft that allows MSN/Hotmail recipients to automatically be unsubscribed from a JangoMail customer's account when they report an e-mail as spam within the MSN/Hotmail environment.
You will now see manual unsubscribes in your account for @msn.com and @hotmail.com e-mail addresses. These are a result of the recipients reporting your e-mail message as spam, and the feedback loop kicking in to automatically unsubscribe these recipients.