In many cases, when you subscribe to an e-mailing list, you must confirm before
the subscription takes effect. If you don't respond to the confirmation
request, sometimes within a given time limit, the subscription won't take
effect. Sometimes there is an authorization code that you must repeat. This is
to prevent being deluged by email from lots of lists that some prankster
subscribes to for you. Confirmation requests are sent by automated servers that
wouldn't understand if you told them it was somebody else's prank. If you need
to contact somebody human, you might try postmaster@whatever-domain (using the
actual domain name).
