Campaign Monitor's general sales information quotes a stat about e-mail marketing ROI for 2007. The article was written in 2006. Can anyone point me to more timely e-mail marketing ROI predicitions?
MarketingSherpa just published their annual email marketing benchmark guide. It's $397, but seems solid. MarketingSherpa generally publish high quality content.
That link mentions a report on email marketing ROI that shows a drop in ROI but still very high figures in 2007.
"In 2005, email returned $57.25 for every dollar spent. Last year this figure dropped to $51.58. This year, the U.S. Direct Marketing Association forecasts email marketing ROI to be just $48.56, with marketers spending around $500 million to drive $23 billion in sales."
For 2008, predictions are for slightly lower ROI but still beating any other medium. Here are some other ROI stats:
Matthew: Thanks for the links. EmailStatCenter is especially interesting.