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After analyzing several studies conducted over the past few years regarding the ROI on email campaigns, I’ve put our findings here in a straight-forward summary on which days and times are the most effective to send emails. The best days to send emails depend on whether it is B2B or B2C.
The best day for B2B: Tuesday (the same as with social media blogs)
The best day for B2C: Friday
This chart, although from a study from 2006, is a simple visual and reflects similar findings to the latest studies.

The best time to send emails: 9 am
Unlike social media sites, emails, especially ones sent to a work email address, are more likely to be considered as high priority. Therefore emails get checked first thing in the morning.

• 9 a.m. performed 15.63% better than 4 p.m.
• 9 a.m. performed 9.4% better than 12 p.m.
• 12 p.m. performed 6.9% better than 4 p.m.
Some regions generally start their work day at 8am, therefore depending on your target market, sending emails as early as 8am is wise.
Click here to access the full case study (subscription required).








December 10th, 2009 at 10:24 pm
Hi Jessica,
This is an amazing graph page! Thanks for sharing. I’ve downloaded your docs as well for review. You guys are amazing.
Michael
Purity 12 Life Blend
http://purity12.com/vitaberry
gopurity12@gmail.com
December 14th, 2009 at 11:11 am
This is important information for any business looking to maximize return on any e-mail marketing campaign. Thanks for sharing it. I’ll never send an e-mail blast out after Tuesday again.
Michael Hepworth
December 19th, 2009 at 5:59 am
Again, wonderful information.
January 11th, 2010 at 11:56 am
Hello,
I think this is valuable information for the US and in my experience it applies to all mature markets. In our experience of European e-commerce enabler, in all immature markets, for instance Southern Europe, b2c NLs have a much better conversion if sent away from weekends and holidays as people mainly buy online from their office connections. This is true wherever bandwidth is not widespread in homes. Feel free to check http://www.zerogrey.com for further insights on international e-commerce.
March 5th, 2010 at 5:05 pm
Excellent post thank you for the info