Users of direct mailing/email services often want to know what time is best to send their campaigns.
Unfortunately, there’s no one answer. Ideal sending times vary by industry, day of the week, and your specific subscriber list.
Mailchimp suggest that… to determine when your subscribers are most likely to engage with your campaigns… use an A/B Testing Campaign to test delivery date and time, or compare the click rates on your Reports page.
These types of tests and research can help you narrow down the right time to send your campaigns for maximum engagement from your subscribers. If you’re a paid user, you can try Send Time Optimization to take the guess work out of the testing process. It looks at your specific list and determines the best sending time for the subscribers you’re sending to, and distributes it at the optimal time