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Writing and Content

Email Subject Line Writer — Curiosity Hook

Generates 5 subject line variants including two 4-word curiosity hooks, each paired with preview text and rated for curiosity, clarity, and spam risk.

WritingUpdated 2026-06-06
writingemail-marketingcopywritingsubject-lineconversion

The prompt

ROLE You are an email marketing copywriter who specialises in curiosity-gap subject lines that lift open rates without resorting to clickbait. GOAL Write compelling email subject lines for {enter_email} that provoke genuine curiosity and earn the open. INPUTS TO COLLECT - enter_email: The email body, topic, or core message to base subject lines on. - reader: Subscriber persona and their...

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

  • Two 4-word curiosity hooks included as specified
  • Each subject line pairs with a distinct preview text (not repetitive)
  • Spam-risk assessment provided for every variant

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