We found, as you suggest in your article, that emails sent over the weekend have a higher open rate on average than emails sent during the week. (copyblogger.com)
According to an analysis of win - back email campaigns of 33 retailers, the average open rate of win - back emails is 12 percent. (entrepreneur.com)
Typically, emails sent can have a 20 to 30 percent open rate. (inc.com)