GrowthHackingIdea - Open rate dropped down by 30% [study]
This is our own fresh A/B test.
We were sending cold emails at 9:00-9:30 am. The average email open rate was 55%.
Then I thought, what if I send emails a bit earlier so that when a person wakes up, an email is already in the inbox. The email's subject, body, and everything else stayed the same. Only the send time changed.
Result: Open rate dropped down by 30%.
I switched back to 9:00-9:30 am. The average email open rate got back to 55%.
Before this test, I thought that whenever you send an email, over time, the same percentage of people will open it sooner or later. This test showed that about 30% of people either open cold emails almost immediately or never open them.
Source: e.growthhackingidea.com

Charlie Patel ;)
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