Global Email Open Rates By Daypart & Device, May 2013 [TABLE]

Some have argued there is a stronger correlation between the smartphone and desktop, as opposed to the smartphone and tablet, and this is certainly the case in terms of when consumers were most likely to open emails. Desktop and smartphone email opens happened most often between 10am and 4pm—during the typical workday. Tablets, meanwhile, saw the greatest percentage of opens in the evening, between 6pm and 10pm. Read the rest at eMarketer.