Type your email address, this can be any email address, but I suggest
creating an anonymous email account just for newsgroup posting.
(As a further warning, never use your real email address in the
configuration of your newsgroup reader or your signature. Alter the address
with something obvious to someone with a legitimate reason to reply, but so
you will not have your email address harvested by spam harvesters. Use a
prefix/suffix like no spam or bogus, etc. Change the part of the email
address after the @ sign. This will lessen the possibility email will be
sent to a real person.)
Anonymous email accounts are available for free. Hushmail Secure Email is
one of many examples available. For more examples do a Google search for
"anonymous email"