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Open Rate increases when it's easy for a subscriber to understand the value of an email before opening it. Create clear subjects, personalize messages, test hypotheses, and maintain database cleanliness.
The email subject is the key to subscriber attention. It should be short, specific, and engaging.
Headlines that work well:
Avoid clichés and clickbait. Instead of "Super secret way to double sales!" use "Simple technique to grow sales by 15%".
The preheader enhances the subject and helps improve Open Rate. It can create intrigue, emphasize benefits, or time limits. Emojis are acceptable if they fit the context.
Example:
Emojis and special characters make the subject more noticeable and convey emotion.
Special characters — for example, square brackets — help highlight the main fragment: "🎥 [Webinar tomorrow], July 10 at 19:00 (MSK)".
Overuse of symbols reduces trust and can trigger spam filters. One or two accents are enough. Always check how emojis display in different clients.
The subscriber should understand from the first second who the email is from.
Choose the most recognizable option and test different formats. Simplicity and transparency are essential.
Time affects openability. Often, morning hours (09:00–12:00) on Tuesdays and Thursdays work better, but there's no universal rule.
Example: business audiences can be reached on Tuesday mornings when the workday has started but the workload is still low.
Even a simple name reference increases Open Rate. But it's better to use behavioral and interest data.
Benefits of personalization:
Inactive addresses worsen metrics and sender reputation.
Example: out of 10,000 subscribers, 4,000 are inactive. By removing them, you increase the share of interested readers.
Read more about database cleaning in a separate guide. Regular audits are part of the strategy.
Continuous A/B testing helps find working hypotheses.
Track metrics: Open Rate, Click Rate, Unsubscribe, Complaint Rate. Make conclusions based on numbers.
Domain appearing in a blacklist immediately reduces deliverability.
If Open Rate dropped sharply, start checking with domain reputation.
Aggressive wording ("Urgent!", "Guaranteed!", "Buy now!") trigger spam filters and irritate readers.
Replace them with neutral options:
Example: ❌ "Free gift only for you!" → ✅ "Your gift and 10% discount for your birthday!".
Tie promotions to events so they look honest and logical.