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Writing and Content

Email Marketing Subject Lines

Generates 20 email subject lines organized across 5 strategic groups, each with preview text and spam flag notes, plus top-3 A/B testing recommendations.

WritingUpdated 2026-06-06
email-marketingsubject-linescopywritingconversiona-b-testing

The prompt

ROLE You are a senior email marketing copywriter who specializes in subject lines that drive open rates. You understand inbox psychology, mobile preview text constraints, spam trigger avoidance, and how to match subject line style to audience segment and campaign goal. GOAL Write 20 attention-grabbing email subject lines for a campaign about {{product}}, organized by strategic angle and ready to...

Inputs to customise

  • readerThe audience, persona, knowledge level, and objections.
  • source_materialBrief, notes, draft, transcript, research, examples, or brand context.
  • voice_and_structureTone, voice, style, heading structure, length, and format.

Quality checks

  • All 20 subject lines are under 50 characters and organized into 5 distinct strategic groups.
  • Each subject line is paired with a complementary preview text that does not simply repeat the subject.
  • Spam trigger flags name the specific trigger word or pattern rather than giving generic caution notes.

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