It’s important to remember that employee engagement is more than employees feeling good about the work they do or liking the people with whom they work. It’s about an employee feeling that they have a role in the company or on the team, that they make a difference, and that they aren’t just a cog in the corporate wheel.
You've written an email that says some things you might be better off saying in person—or not at all—right? Like when you wanted to tell off a co-worker—or supervisor—about taking credit for your work, or putting you down in front of the boss, or just for generally being a jerk. Maybe you were caught up in the anger of the moment—you let your temper get the best of you—or maybe you were just a bit—or a lot—drunk. And maybe you hit that "Send" button, and maybe you reconsidered before it was too late. I don't like to imagine the result of sending such a message.