Best Time of Day to Send Email Blast

September 2, 2019


Being in the email marketing business you must certainly have heard about email blast. Now the best time of the day to employ it can vary depending on different factors. Time zones, jobs, business hours, device and much more, just to name a few.

Here we are presenting data and studies that allow us to tell you the best time of day to send email blast. This is crucial to get a good open rate and thus maximize the effectiveness of your email campaign.

Before getting to the actual information we can cover some of the basics. We also can provide a comparison between email open rates a few years back and now. This will help us clarify the difference between the devices used to open emails and thus the best time to send emails to each. This of course makes a difference of time when implementing an email blast. However, before we get to that, we have to cover the basics first.

What is an email blast?

Email blast is just sending a large number of emails to different recipients in a mailing list. People running email marketing campaigns do this all the time, even without knowing. Emails blast works best when you have a segmented email list. It goes without saying that for the best results to be possible said list must be verified. For this last bit the best service is available to you right now. VerifyBee

Best time of day to send email blast.

Right now, there are two things to consider when deciding the best time to send email blast. The first is the device that will open the email and the second but most important is the time zone of the recipient.

Over the last couple of years, we’ve seen open rates drastically increase in mobile devices. This is so much so that they are now considered to be the lead device in a marketing campaign. The average person spends about 30 hours per week in their email while they work.

In accordance to studies done the best time of the day to send email, is at the beginning of the weekdays. In a more detailed approach, we find that emails keep being opened trough all the day. This does not mean that your emails will be opened of you send them at any time of the day. If you’re sending an email blast due to business-oriented email marketing campaign then the usual work hours are a good choice of time to send an email blast.

Consider the time zone of your recipient and segment your list.

In order for the following information to be used properly you should segment your mailing list. Any email marketing client can help you with this. A good idea would be to segment your mailing list based on the time zone of the recipients in your list.

This is crucial for the success of an email blast. Otherwise you would be sending your email blast at different times for different people. This will lead to mixed or bad results.

The data.

According to studies the best time of the day to send an emails blast is between 9am and 5pm, With the exclusion of lunch time. This means that the higher chance to get your emails notice is basically during work hours. To be more precise over 53% of all emails are opened between 9am and 5pm.

Be aware that you should also take care of providing good content for your readers, otherwise this is all irrelevant. If you need more help on this you can check out our article about the anatomy of the perfect email. For now, let’s review when do emails open occur and thus this will give us even more information on the best time of day to send email blast.

Email opens then.

Based in over 192 million opens we have the following data from October 2013.

email open rate vs time graph

As you see, this data is consistent with our information. Over 53% of all emails are opened in business hours between 9am and 5pm.

In some cases, like in Spain, people are known to open their emails at night. This is to say that about 24% of all emails are opened between 6pm and 11pm.

In other cases, people might open their emails in the morning. This is to say that 16% of all emails are opened between midnight and 8am.

This however still means that the most emails occur in business hours, having peaks in the open rates just before and after lunch. While in the actual lunch time the open rates drop.

Incidentally 47% of all email opens occur outside business hours and the majority of these opens are done via a mobile device. Keep this in mind for your email marketing campaign and your email blast. Optimization for mobile devices is of outmost importance now days. Especially when looking for the best time of day to send email blast.

Email opens now.

With the data obtained from SuperOffice the email open rates for 2018 can be seen in the image below.

email open rate by hour

This basically tells us that the trend for best open rates in business hours is still in place. We can also provide even more insight due to a comparation between mobile devices and desktops when it comes to open rates.

email open rate

The image above shows an inverse relationship between the time of day and the platform used to open the emails. Emails before and after work are opened using mobile devices. While the desktop is used the most during business hours.

Do keep thins in mind when segmenting your list. If the content you provide in your emails can be more compatible on mobile devices than in desktops then you might want to send it before or after work hours. In the opposite case then stick with the business hours. This all can be decided using the nature of your email marketing campaign as a factor to help you determine the best time of day to send email blast.


People do tend to open emails more at work, thus the best time of day to send email blast is between 9am and 5pm. Do keep in mind the very nature of your email marketing campaign and the emails you’re going to send. If it just a newsletter or something of minor importance then it might be best to send them before or after the work hours of your recipients. Do consider for this the proper optimization for mobile devices.

If you like this article and you would like to see more like it then be sure to visit our blog. Hopefully you can take advantage of this information and used in favor of your email marketing campaign.

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