That's not even counting the transactional shipping confirmations and informational blog post notifications. Or all the work-related newsletters I have sent to my address at Moz.
I do not open most of this email. In fact, preparing for this blog post, I've had a really fun time shunting it off into a folder called "content examples." But receiving so much email is an excellent opportunity to think about what motivates me to open and email, what doesn't, and what really annoys me.