Internet users around the world send an estimated <A HREF="http://news.zdnet.com/2100-1009_22-6064869.html?tag=zdnn.alert">60 billion emails every day,</A> and many of those are spam or scam attempts, business leaders said on Tuesday. Deutsche Telekom Chief Executive Kai-Uwe Ricke said cybercriminals were growing more active and sophisticated, and the vast email traffic meant industry, government and Internet users had to be vigilant and work together.