Email Deliverability Experiences Historic Decline in Second Half of 2011: A recent analysis of inbox placement rates of marketing messages show sharp deliverability rates in the second half of 2011. According to Global Email Deliverability Benchmark report, for the first time in three years, there has been a major global decline of 6% in the second half of 2011 bringing inbox placement rates to a record low of 76.5% globally, compared to 81% in the first half of 2011.