Do people look forward to getting your mail?
If people open your email campaigns automatically, congratulations. You're doing very well!
I get regular email from some of my favorite resources. One of them is Griot's Garage. Last week I got their latest mail and I laughed out loud when I realized I'd opened it without thinking. As a marketing guy, I found it intriguing.
Then I began to ponder some of the things I know about email marketing. Human behavior is complex. There's never just one thing that makes people do what they do.