The results from several studies, that was based on billions of emails sent, have identified the optimal times for sending email.
The results are based on looking at the data from the perspective of when or at what time do people open or click on their email messages. It is also worth noting that for a higher engagement / response rate to your email, you should create a message that speaks to the audience to whom you are sending the email.
When to Send Your Email
Top 3 times to send email are: 6 AM, 11 AM, 5 AM
Top 3 times to send email are: 8 AM, 9 AM, 10 AM
Top 3 times to send email are: 6 AM, 10 AM, 12 AM
Top 3 times to send email are: 9 AM, 8 AM, 11 AM
There is no one time during the day when everyone (or even half of everyone) will just stop what they are doing and say, “let me read my email”. Each person makes an individual decision about when to read email. However, when sending your email, the data does show that you should avoid sending your email too early in any time zone; for example, you should not send email at 3 am or 4 am.