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Use the CSS Inliner Tool: http://beaker.mailchimp.com/inline-css http://beaker.mailchimp.com/inline-css Also, read MailChimp's study on responsive emails: ht

• nnnnnn 14y ago
  To add to Sam's comment, if you're using Rails, try: https://github.com/fphilipe/premailer-rails3 https://github.com/fphilipe/premailer-rails3 There are a few gotcha's with the gem but overall it works pretty smoothly!