Also, once we fix this issue, how are we going to synchronize with User Preferences, when User decides to enable this preference we may need to make a call to Mandrill to undo the 'unsubcribe'.
Forwarding an e-mail breaks the 'unsubscribe' link (by Design?)
We should have used sub-account "notification", we forgot and used "marketing" by mistake -- (We should not let "notification" e-mails to unsubscribe - by design)
Something must be wrong in the Template markup.
Also, once we fix this issue, how are we going to synchronize with User Preferences, when User decides to enable this preference we may need to make a call to Mandrill to undo the 'unsubcribe'.