My Yahoo account puts the spam in a Bulk Mail folder, but I still have
to see the stuff.
Is there a spam blocker or anti-virus system that will the make the
spam with virus signatures not even get to my mailbox?
The only solution that I know of is to use a challenge response system
for my email
Please don't use challenge response. It will work for you and others
as long as there aren't very many of you.
But in the process it will generate challenges to addresses in the
"From:" field that have been faked by a spammer or a virus. This will
create lots of spam for other people. Even if you don't care about
that, there are admins that will blocklist. Go read
news.admin.net-abuse.email and see what they think about challenge /
response.
I think right now the best bet for a Yahoo user (I'm one) is to write
a paper mail letter and emphasize that they need to add more options,
unless they're trying to get people to quit using their services. I
did that about a year and a half ago, and shortly thereafter SpamGuard
took a great leap forward in effectiveness.
But they need to do something now. For example, allow their filters
to delete email right away instead of just putting it in the Trash
folder. Or, automatically delete items from the Trash when the quota
is reached. Or delete email with attachments. Any of these would be
an improvement.