As part of its Q4 2012 Email Marketing Quarterly Benchmark Study [download page], Experian Marketing Services has analyzed the best time of the day to send emails, cautioning that the data is retrospective rather than controlled, and that optimal deployments likely vary by industry, and even by brand. But that doesn’t mean it hurts to take a look at the results. And those seem to show somewhat of an inverse relationship between email volume and results.

via Most Emails Deployed in the Morning – But Best Results Seen in the Evening.