Apparently it’s increasing to close to pre-McColo ( one of the major sources of spam last year which was clsoed down ) levels. Levels are now at 74.6% which means that every 3 in 4 emails are spam. The Mega-D (Ozdoc) botnet is making the largest single contribution to junk mail levels, sending more than 26m spam emails per minute. Meanwhile, the Cutwail (Pandex) remains the largest active botnet with more than 1m active IPs this month. We are yet to see any junk mail from machines compromised by the Conficker worm.