Administravia - list unsubscription

[Alex Bligh]

Is it possible (given recent messages both on and off list) to put
a footer on the bottom of each mail message saying how to unsubscribe.

Something like:
	You are receiving this message because your email address is
	subscribed to the mailing-list license-discuss at opensource.org.
	If you want to unsubscribe, please send an empty email to
	license-discuss-unsubscribe at opensource.org. More info at:
	http://www.opensource.org/licenses/

Alex