What is an average / target open rate for an HTML-based monthly newsletter? I am measuring open rate based on the number of hits a particular image within the newsletter gets. However, more and more email clients nowadays are disabling emails until the user clicks a link - and how many users actually click the link? Is read rate based on a user reading a piece of mail or actually clicking the link to read it correctly (and therefore, be tracked). Unless I'm mistaken, there's no way to track read rate unless images are enabled.