Srizbi grows into world's largest botnet
This is the reason you are seeing such an increase in the amount of spam you are receiving. The botnets are getting bigger and more effective with each passing month.
The prodigious Srizbi botnet has continued to grow and now accounts for up to 50% of the spam being filtered by one security company... Srizbi is now the biggest single menace on the Internet, dwarfing even the feared and mysterious Storm... Having compromised 300,000 PCs around the world, it was now sending out an estimated 60 billion spam e-mails per day on "watches, pens, male enlargement pills"... Srizbi is the single greatest spam threat we have ever seen. At its peak, the highly publicized Storm botnet only accounted for 20% of spam. Srizbi now produces more spam than all the other botnets combined.
