MX Toolbox has removed the BLARS Blacklist from the free blacklist lookup tool. BLARS is notorious for false positives and high costs to get unlisted. Now, it seems that the list is defunct (we are not positive when it happened, but BLARS.org is currently a parked page with GoDaddy). We are going to keep a close eye on this, and we will put it back on the list if we see any compelling reason to do so. Please give us some feedback if you see any problems associated with this move.