Bluebulb Projects' The Measure of Things presents:
570 is about 0.000000002 times the number of Emails Sent per Day
In other words, it's 0.000000001940 times the count of Emails Sent per Day, and the count of Emails Sent per Day is 515,000,000 times that amount.
(2010 figures) (estimated averages)
Each day, human computer users and automated programs send about 294 billion emails. Of those, an estimated 214 billion emails are spam advertisements for pharmaceuticals or drugs.