- 16.9% decrease in open rates when the word “newsletter” is used in subject lines.
- 36% of email recipients open email based on subject line alone.
- 39% of emails are opened on mobile first – where the average mobile screen can only fit 4-7 words max.
- 63.6% increase in opens when using the word “alert” in subject lines.
- 66% of email recipients report email as based solely on the subject line.
- Emails with “Meeting” in the subject line were opened 6% less than those without.
- Emails with “Quick” in the subject line were opened 16% less than those without.
- Emails with “Tomorrow” in the subject line were opened 9% more than those without.
- Emails with “Free” in the subject line were opened 9% more than those without.
- Emails with “fw:” in the subject line were opened 16% less than those without.
- Emails with “You” in the subject line were opened 6% less than those without.
- Emails with no subject all together were opened 9% more than those with a subject line.
- Personalized subject lines are 24.9% more likely to be opened.
- Subject lines that create a sense of urgency and exclusivity can give a 21% higher open rate.
- Subject lines with 27 or fewer characters have an above average open rate.
- Subject lines with 3 or more words are opened 12% less than those with 1-2.
- The top five subject lines in a recent study all included “Re:”.
- Using “Daily” or “Weekly” in subject lines boosts open rates whereas “Monthly” hurts them.
- Using the words “Sale,” “New,” or “Video” in subject lines boost open rates by 24%.
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