Open Rate
Open rate is the share of delivered emails that were opened.
Open rate is the number of opens divided by the number of emails delivered. It is a quick sign of how appealing your subject line and sender name are.
Treat open rate as a rough guide, not an exact number. Some email apps load images in the background, which can count as an open even when no one really read the message.
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Start freeLast updated: June 25, 2026