A new report by Jupiter Research forecasts that spending on e-mail marketing in the U.S. will rise from $2.1 billion in 2003 to $6.1 billion in 2008. The press release explains three factors will be critical in driving the market: the dramatic cost reductions of e-mail marketing, the growth of sponsored and acquisition e-mail campaigns and the ever-increasing challenges presented by spam.
Customer retention e-mail campaigns account the greatest share of non-spam e-mail marketing campaigns.