Email subject lines
📖 3 min readUpdated 2026-04-19
Subject lines are your email's hook. Short, specific, personal wins.
Patterns that work
- Question
- Specific number / detail
- Curiosity gap
- Direct value promise
- Personal / conversational
Anti-patterns
- All caps
- Multiple exclamations
- Marketing buzzwords ('Don't miss!')
- Clickbait without payoff
Length
30-50 chars optimal. Mobile cuts off at ~30-40.
A/B test
Always test 2 variants. Small changes can swing open rate 5-20%.