Email Open Rate
Email open rate is the percentage of delivered emails that recipients open, calculated as unique opens divided by delivered emails.
In depth
Open rate is tracked with a tiny invisible tracking pixel that loads when a recipient views the message, registering the open event back to your sending platform. Because privacy features like Apple Mail Privacy Protection now pre-load images, raw open numbers can be inflated, so many teams treat open rate as a directional signal for subject-line and sender-reputation health rather than an exact measurement.
For a lead-qualification funnel, open rate is the first gate in the engagement chain: a lead who never opens your follow-up never sees your quiz invitation or result-based offer. A common pitfall is optimizing only for opens with clickbait subject lines, which spikes opens but tanks downstream clicks and replies. Instead, treat open rate as the top-of-sequence diagnostic, then pair it with click and reply data to judge whether your nurture content actually moves a scorecard lead toward conversion.
Example in practice
Frequently asked questions
What is a good email open rate?
Across B2B SaaS, open rates commonly fall between 20% and 40%, though this varies by industry, list quality, and sending reputation. Because privacy tools inflate the metric, focus on relative changes within your own audience rather than chasing a universal benchmark.
Why is my open rate inaccurate?
Privacy features such as Apple Mail Privacy Protection pre-load tracking pixels, which counts opens that never happened. This means raw open rates skew high, so pair them with click and reply data for a truer read on engagement.
How can I improve email open rate?
Improve subject-line relevance, send from a recognizable sender name, and maintain a clean, warmed-up sending domain. Segmenting by quiz score or behavior so each message matches the lead's interest also lifts opens.