Email Subject Line Headlines: 3 Examples (and a Free Analyzer)

A subject line lives or dies in the inbox preview, competing with dozens of unread bolds. Curiosity, specificity, or a hint of the reader's own words earns the open before the body ever loads.

3 email subject line headline examples that work

• quick question about your cart30 chars · 5 words
• You left 3 things behind (and 1 is almost gone)47 chars · 10 words
• Open this before your trial ends tomorrow41 chars · 7 words

Rules for email subject line headlines

• Keep it under 40 characters so mobile clients don't clip the payoff.
• Lead with the reader's benefit or a question, not your brand name.
• Lowercase, human phrasing often out-opens polished title case.
• Pair the subject with a preview line that extends, not repeats, the hook.