It's done on the same page on which you signed up for the list:
http://lists.pglaf.org/mailman/listinfo
click on the list you want to be removed from (posted, in this case)
go to the bottom of the resulting page
you'll see an Unsubscribe button--to its left, enter the same email
address that you used to subscribe, then click the button.
FYI - one of the options provided in your subscription profile is to
receive only a daily summary (digest) of postings, not all the
individual messages.
-----Original Message-----
From: Barbara Faulkner [mailto:bicyclebaf@gmail.com]
Sent: Wednesday, November 16, 2011 4:58 PM
To: Al Haines; Project Gutenberg Postings Announcements
Subject: Re: [posted] Posted (#38037, Various) !
How do I get my name off this mailing list - I am getting too many
emails and right now I can't seem to down load any of the books to my
Kindle
Please help me
Barbara Alice
On 16 November 2011 16:46, Al Haines