Now there's no way I buy into that number, but anything that helps increase overall performance I'm down for. This was just released by StrongMail and might be worth a read...best part is that it's free! :240: source: StrongMail.com
600% improvement? Sounds totally believable just like all those weight loss ads. If you can pick the worst and the best result I am sure you can find a difference greater than 600%.
My ROI on email marketing is well beyond 3000%...but I with all the money Strongmail would be siphoning out of your pockets, I doubt you'd be seeing much ROI with them.