The Results of your Request page will appear. If not, you may have you spelled your e-mail address incorrectly. If so you will receive no notification at all. You will receive e-mail notification that you are no longer on the list. Sign-off and Unsubscribe have exactly the same effect.
Some lists choose to use one or the other term.
You should receive e-mail confirmation that you have joined the list. OR Email the list and ask the list owner to alter your e-mail details. The process below enables you to put up your own welcome message. New members of your list will receive two welcome messages. One generated by listserv and the one generated by you.