I have received the following e-mail  "UnsubscribeNow.org   FWD: ADV:
IMPORTANT: this email address is circulating...  6/2/2004   11:35 pm"
which sounds like something which will prevent spam -- or it might be
an invitation to loaddown a virus. I am afraid to open it. Does
anybody know how reputable or unreputable the "UnsubscribeNow.org" is?

Hello Vaac

According to the Spamhaus.com website:

"UnsubscribeNow.org is a protection racket scam run by spammers,
UnsubscribeNow.org attempts to fleece naive Internet users $21.95 by
sending out large volumes of spam to advertize that by paying $21.95
you won't get more spam from the likes of UnsubscribeNow.org"
http://www.spamhaus.org/removelists.html

This is backed up here:
http://www.broadbandreports.com/forum/remark,9191766~mode=flat
http://www.gamedev.net/community/forums/topic.asp?topic_id=219684
http://use.perl.org/comments.pl?sid=18756&cid=30980
http://www.broadbandreports.com/forum/remark,9452671~mode=flat

I always use this as a general rule of thumb, if I do not know who the
person is who sent the email I delete it.

I hope you have found this answer helpful.  If you have any further
questions on this subject please ask for clarification and I will do
all I can to help you.

Thanks and sorry for rating this question so late as I was busy with
medical problems. Your answer will keep me out of a lot of wasted
time!