SUMMARY: You would be surprised how many marketers are confused about how to
judge if their email campaigns are successful. This quick, useful
1. Open Rate: Never a Certainty
2. Click Through Rate (CTR): Beware of Confusing Math
3. Conversions: Are You Counting Everything?
4. Unsubscribes/Opt-Outs: Unimportant!
5. Delivery Metrics: Tech Hell