A full two weeks after a Web hosting firm identified by the computer security community as a major host of organizations engaged in spam activity was taken offline, the volume of spam sent globally each day has yet to bounce back. The block graph over at e-mail security firm IronPort suggests that the company blocked around 35 billion spam messages on Monday. Prior to hosting provider McColo’s shutdown, IronPort was flagging somewhere around 160 billion junk e-mails per day. A quick glance at the volume flagged by Spamcop.net shows that they’re still detecting well below half of the spam volumes they were just two weeks ago. I’m not suggesting this is a permanent situation: I happen to agree with most experts who have said they expect spam volumes to at some point bounce back or even exceed previous levels. Still, it is nice to see this drop in junk e-mail