Email remains the most productive channel when it comes to ROI, according to new DMA statistics.

In 2009, email returned a “whopping $43.62 for every dollar spent on it,” according to a synopsis of the DMA report by ace reporter Ken Magill.

That’s a slight dip from $44.93 in 2008. But it still beats out other media. According to Magill (and the DMA), here’s how some other channels stacked up:

Internet search advertising—$21.85

Non-catalog direct mail—$15.22

Catalogs—$7.32

Marketers spent $600 billion on email in 2009, and are expected to spent $700 billion in 2010, according to Magill and the DMA.

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