Email Subject Line Tester

Email subject line optimization agent. Generates 10 subject line variants for any email, scores each by open rate predictors (urgency, personalization, curiosity, length, emoji use), and recommends the top 3 for A/B testing. Triggers: subject line, email subject, subject line tester, subject line generator, email open rate, ab test email, subject line optimization, email copywriting, subject line ideas, newsletter subject, email marketing subject

by @mguozhen·MIT-0