Newsletter Open Rate
Newsletter open rate is the share of delivered copies of an issue with a recorded open. Compare similar audiences and account for automated image loading.
Newsletter open rate is the percentage of delivered copies of an issue with a recorded unique open. Calculate it as recorded unique opens divided by delivered emails, multiplied by 100.
The number comes from tracking, not a count of people who read the issue. Image blocking and automatic image loading can move it in either direction. The open-rate definition covers the calculation and tracking limits in more detail.
Compare issues on similar terms
Check whether both issues went to the same kind of audience. A new signup source, a large import, or a change in email-client mix can make a comparison misleading. Use the same time after sending and the same automated-open filters for each issue.
A subject line, sender name, and preview text help a subscriber decide whether to open. The recorded rate cannot isolate the effect of any one of them. If you test a subject line, keep the audience split and other message details controlled, and decide how you will account for unreliable open tracking.
For the issue itself, inspect which links received qualified clicks and whether readers replied or completed the intended action. Those measures answer different questions. None supplies a universal “good” newsletter open rate.