How does Mailchimp know email was opened?
How we calculate open and click rates. The open rate is a percentage that tells you how many successfully delivered campaigns were opened by subscribers. To find this out, Mailchimp loads a tiny, transparent image into each campaign, and counts how often the image is loaded among the delivered campaigns.
What percentage of emails are opened?
Average Totals
The average email open rate for all industries we analyzed is 21.33%. Open rates are one of the best ways to tell whether your email strategy is working. This number shows what percentage of your audience opens the emails you send them.