Goes to show you the importance of a good spam filter. A few other interesting stats quoted at the source.
"Hold on to your seats, stat lovers, 2010 is about to hit you with the full force of its quantifiable web exploits. Web monitoring site Pingdom reports that last year we all sent 107 trillion emails to our loved and unloved ones, which breaks down to 294 billion per day, though only 10.9 percent of those weren't spam. There are now 1.88 billion email users around the globe and when they're not too busy communicating, they're surfing one of the net's 255 million total sites (21.4 million of which are said to have arrived in 2010). The compendium of numerical knowledge wraps up with a look at social media, where Twitter still has a way to go before catching up with email -- there were only 25 billion tweets last year -- but continues to grow like mad, having added 100 million users during the year. Facebook added even more, 250 million users"