Frame email subject lines to appeal to the higher-level position your audience desires. A manager wants to know what a CMO is doing. This psychological tactic, which plays on ambition, can lift open rates by 24-28% over standard personalization by speaking to who your audience wants to become.

Combine two specific audience identifiers in your subject line, like role and company attribute ("Mid-market CMOs") or interest and a pain point ("Beauty fans with sensitive skin"). This "double personalization" tactic reportedly increases B2B open rates by 24% and B2C by 29% by making the message feel hyper-relevant.

Many marketers mistakenly summarize their entire email in the subject line, removing any incentive to open it. To increase curiosity, provide only a hint or a compelling data point from the email's content. This creates an information gap that subscribers feel compelled to close by clicking.

Sales director Florin Tertulia uses cheeky, playful subject lines like "Ronald's beef. Isn't with us" to create a "scroll stopper." This tactic is designed to break the pattern of standard corporate emails, sparking curiosity and standing out in a crowded C-level inbox.

To combat users' rapid 'social scroll' behavior within their email inbox, use subject lines that disrupt their scanning pattern. Phrases like "wait... this worked?" or "okay... this surprised me" create a crucial millisecond pause, which can radically increase email open rates.

To break through the noise, Astronomer used a subject line that simultaneously qualified the recipient and created intrigue. This direct, almost challenging, approach proved highly effective in capturing the attention of their specific target audience—Airflow users—and drove successful email campaigns.

Switching from clear but safe subject lines (e.g., '3 ways to...') to provocative, curiosity-piquing ones dramatically improved open rates. The speaker notes that if a subject line feels slightly uncomfortable to send, it's probably a good sign.

A counterintuitive yet effective email tactic is capitalizing an entire word in the middle of a subject line, not at the start or end. This simple, cost-free A/B test is trending because it breaks visual patterns in the inbox, leading to a reported 16% open rate increase for B2B and 21% for B2C.

Many marketers mistakenly reveal the entire value of an email in the subject line, killing any reason to open it. To maximize opens, provide a compelling hint or create a curiosity gap rather than giving away the full story.