Compare the performance of your email marketing against this benchmark data, which was provided from various sources, to help you identify industry trends and compare your results against others. Here’s a few free resources:

Trailing 3 Months – Bronto
2009 by Industry – MailChimp
Q1 2009
– Epsilon
Q2-Q4 2008
MailerMailer
2006-2008
– Email Stat Center

But if you’re serious about email marketing, you should check out MarketingSherpa’s 2009 Email Marketing Benchmark Guide , it consists of:

– 205 Charts
– 66 Tables and Images
– 8 Eyetracking Heatmaps
– Research from 1,763 marketers
– 6 New Special Reports
– 12 Point Plan to Increase Email Performance
– 8 New Case Studies

It costs $397 and can be downloaded here.

(Thanks to Clayton Mellgren, a member of Email Marketing Gurus, for largely compiling this list.)