Good spam blocker.
 

What is a good spam blocker for outlook to block that junk mail that keeps coming in?

Spam Inspector

I use SPAMARREST

It works very well for us!

I use SpamBayes (http://spambayes.sourceforge.net/) Integrates with Outlook (not Outlook Express) and learns as you get more and more spam. I really like it.

which is free?

I use spamassassin on the server, and then filter the small amount that gets thru with Spam Fighter

switch to thunderbird.

I use "Delete" Button V6.13

Uber-1337

spampal.org its free and works great

i use cloudmark and its awesome.
it's based on a community of users.
go here: www.cloudmark.com/products/safetybar/
and use my referral code: 2rt34 if you decide to join.
its great and well worth it!

Mozilla Thunderbird. the email program.

I am going to try that

CloudMark Rocks!

It has blocked 516,195 emails for me so far.

Very Accurate

I concur with this suggestion. The reason it works is that it uses a COMBINATION of filters (extensive blocklists) and a REGEX filter. You can also select a Baysian filter as well.

It is written by James Farmer ( a wlll know anti_spammer) and ITS free. You can donate via paypal since the product is really better than many of the commerical ones. :thumbsup