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The Question

Mark Brownlow has a list of 12 questions every email marketer should ask about their marketing program. Buried in the middle is the most important question for delivery.

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The overlooked secret of marketing

Seth Godin posted recently about the overlooked secret of marketing: time

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List Attrition

DJ over at Bronto blog has a post up about list churn / list attrition. She quotes a statistic published by Loren from MediaPost (the original post is behind a subscription wall) that a list will lose 30% of their subscribers year over year. This is similar to a statistic that I use, but the context I have seen the published statistic in is slightly different. DJ offers suggestions on how to reduce this churn. All the suggestions are great, but I think that they slightly miss the point. There are multiple processes that can be described as list churn. One is churn DJ addresses, that is people unsubscribe from a mailing list. The other is people abandon their email addresses. Individual mailers have some control over the first type of churn, but almost no control over the second.
I think the study Loren was quoting describes the second phenomenon not the first. In 2002, ReturnPath published a study that showed 31% of people changed email addresses in a single year. Understand, this does not mean that 31% of recipients on any particular list will actively decide to unsubscribe from a list or report it as spam or otherwise unsubscribe from that list. This is 31% of all email address owners will get a new address and abandon their current one. There are a few reasons for the churn.

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