MailChimp has a neat page where they list the average open rates for the 5.5 million mailing lists people manage using MailChimp's platform: http://mailchimp.co

MailChimp has a neat page where they list the average open rates for the 5.5 million mailing lists people manage using MailChimp's platform: http://mailchimp.com/resources/research/ http://mailchimp.com/resources/research/ "Most emails are sent between Monday and Friday, with the highest volume on Tuesday and Thursday. More subscribers open email, however, on Wednesday and Thursday." "Subscribers are likely to open email after 12pm, and the most active hours are 2-5pm." "Your newest subscribers are your best subscribers. They’re most engaged immediately after signup, and then trail off over time." Those are averages though, your mileage may vary. For the newsletters I send out, Tuesday morning has proven to be the sweet spot. More information: http://kb.mailchimp.com/article/when-is-the-best-time-to-send-emails http://kb.mailchimp.com/article/when-is-the-best-time-to-sen...