The number of emails arriving in subscribers’ inboxes increased by 9% between 2Q13 and 2Q14. The overall email open rate declined 3% during the same period, most likely because of the added volume of messages. Yet the number of opens for each active subscriber actually increased 6% year-over-year (YOY).
Basically, consumers and customers are getting more and more e-mails and opening even fewer than they used to. To figure out how to get your e-mails opened, check out this article here.