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 Is Your Email List Too Big to Work?

Forgot using that crystal ball – the size of your email list could be the best predictor of how many clicks you get or how many people will actually open up your email.

There’s an inverse relationship between list size and email responsiveness, according to a study by ExactTarget, an email service provider. The study reveals that open and click-through rates both decrease steadily as the list size increases.

ExactTarget revealed that email campaigns sent to lists of 101 to 1,000 addresses achieved open rates of 42.1 percent and click-through rates of 6.8 percent. For 100 or less addresses, the open rates were 48.4 percent and click-through rates of 8.8 percent. Larger lists – those email campaigns sent to lists of 1,001 to 10,000 achieved open rates of 33.2 percent and click-through of 5.1 percent.

For email campaigns going out to 10,001 to 100,000 – those addresses fueled open rates of 25.8 percent and 4.5 percent click-throughs. And finally, those email campaigns sent to lists of more than 100,000 addresses generated open rates of 18.2 percent and click-through rates of 3.6 percent.

The study also found that B2B organizations experienced higher open and click-through rates than their B2C counterparts. Fifty-two percent of B2B email campaigns were sent to lists of less than 1,000 subscribers and only 5.6 percent of B2B campaigns were sent to lists of more than 10,000 subscribers. Compare that with 41 percent of B2C campaigns sent to lists of more than 10,000 subscribers.

The study also shows that the downward trend in open rates by list size stabilizes at between 15 percent to 20 percent average open rate when reaching 400,000 to 500,000 subscribers. The audience appears to be of significant size so that adding more names to the list does not have an increased negative affect on open rates.

ExactTarget’s study includes data collected last year from more than 4,000 organizations, 230,000 email campaigns and 2.7 billion email messages.
 


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