As email turns 32 years old tomorrow, US-based email delivery service provider SendGrid has done a global study on email engagement. Today, the company is releasing Europe-specific data on ‘email opens’, based on an analysis of 8 billion unique emails sent by over 125,000 companies (including the likes of Uber, Spotify, Airbnb, Foursquare and Pinterest) over two 10-day periods in 2013 and 2014. Continue Reading