
7 Email Engagement Metrics to Track for AI Inboxes
Open rates stopped measuring people in 2021. Here are seven email engagement metrics that shape inbox placement in the AI era, how to calculate each, and which to build first. Read more

Researchers at Zero Bounce surveyed 1,000 professionals to find out the most dreaded phrases, days, and tones in work emails.
The top two stressful phrases in work emails are "Need this ASAP" and "Can we chat?" while the most avoided subject lines are "Re: [No subject]" and "Quick chat?".
Monday is the most stressful day for receiving work emails, and Friday afternoon is the most stressful time. Workers prefer minimalist and professional tones in out-of-office emails.
Email Subject Lines and Phrases That Stress Workers Out the Most
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Open rates stopped measuring people in 2021. Here are seven email engagement metrics that shape inbox placement in the AI era, how to calculate each, and which to build first. Read more
Do image-heavy small business marketing emails perform better or worse compared with text-heavy emails? To find out, researchers examined the performance of more than 3 million campaigns.
Americans say an email from a business is more likely to feel trustworthy if it includes clear identifiers like the sender's contact details and the company's domain address, according to recent research.
Most enterprise marketers say four or more team members are typically involved in the production of a single marketing email, according to recent research.
Marketers say increasing engagement and expanding the use of AI tools are their top email marketing priorities in 2026, according to research from Litmus.
Most cold emails fail because they sound like templates. Learn how the read-aloud test, concise messaging, and personalized outreach can improve reply rates and drive more conversations. Read more