Spam Volumes: Past & Present, Global & Local
Summary: Symantec MessageLabs data shows global spam volumes fell from highs of 6 trillion messages per month to just below 1 trillion, with steep drops coinciding with the disconnection of rogue ISPs McColo Corp. and 3FN and takedowns of the Bredolab, Rustock and Grum botnets. Cloudmark data put spam at 22% of email for Yahoo! users, 11% for Microsoft and 6% for Google, and a site selling bulk-created accounts charged $35 per 1,000 Yahoo Mail accounts versus $150 per 500 Gmail accounts.
What you should know: Yahoo accounts sold for roughly 3.5 cents each against about 30 cents for Gmail - nearly 10x cheaper - which Cloudmark's Andrew Conway tied to weaker account-creation controls and to cost-cutting that treats spam prevention as a cost center, so spammers simply follow the line of least resistance.
Read the original at Krebs on Security ↗
- Topics
- Data Breaches
- Related
- TSMC employee data breach linked to cloud provider Cyber Risks · Nov 15, 2026Data Breach at La Poste Subsidiary Maileva Affects 22 Million People in France Cyber Risks · Nov 15, 2026City of Osaka warns of data breach impacting 1 million as Japan reels from dozens of cyber incidents Cyber Risks · Nov 13, 2026