http://www.debian.org/Bugs/ can be used to search the Debian bug
database by various criteria.
+
+If you are trying to unsubscribe, view the headers of the mail that
+was sent you and follow the unsubscription information there. In the
+cases where you are the submitter of a bug, there is no unsubscription
+information, and you need to use the control interface to change the
+submitter or send a mail to -done to close your bug. See the
+documentation above for information on how to do that.