AI prompt to write email subject lines

Consistent, helpful content keeps an agency visible in its community and builds trust before anyone needs a quote. AI drafts posts, emails, videos and web copy quickly, so an agent can publish regularly without a marketing team.

Below is a ready-to-copy prompt to write email subject lines, a detailed version that asks you clarifying questions first, and 2 specialized AI tools (Jasper and Copy.ai) with instructions for this task. It also works in ChatGPT, Claude, Gemini or Copilot.

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The prompt

Write 15 email subject lines (under 45 characters) and matching preheaders for an insurance agency's monthly newsletter. No clickbait or misleading urgency.

Detailed version (asks clarifying questions first)

Act as an experienced assistant to a licensed insurance agent. Before answering, ask me up to 3 clarifying questions (the audience, the channel and your agency's voice). Then complete this task, and finish with a short checklist of statements I should verify with my compliance team.

Task: Write 15 email subject lines (under 45 characters) and matching preheaders for an insurance agency's monthly newsletter. No clickbait or misleading urgency.

What a good result looks like

Good subject lines are short, specific and honest: they tell the reader what's inside ('3 ways to prep your home for winter') and the preheader adds a reason to open. A mix of tips, questions and agency news works better than repeating one style.

Common mistakes and watch-outs

Avoid fake urgency ('Last chance!'), 'RE:' tricks and misleading claims ('Save hundreds'), which hurt trust and can break CAN-SPAM rules. Check that every subject matches the newsletter content.

How to adapt the prompt

Give the AI this month's topics so subject lines match the actual articles. Jasper or Copy.ai can produce more variations; test two subject lines on a small share of your list if your email tool supports it.

EXAMPLE output (placeholder data, not a real client)

1. Winter home prep: 3 quick wins
   Preheader: Small steps that help prevent frozen pipes.

2. What your deductible really means
   Preheader: A 1-minute explainer with an example.

3. Meet our newest team member
   Preheader: Say hi to [First Name] at the front desk.

4. Teen driver in the house?
   Preheader: What to ask before they get their license.

How to use it

Copy the prompt. Copy the short prompt above, or the detailed version if you want the AI to ask clarifying questions first.
Add your details. Add the details for your situation (line of business, audience, tone). Keep it de-identified; never paste client personal information.
Run it in the right tool. Paste it into ChatGPT, Claude, Gemini or Copilot, or use Jasper and Copy.ai as described below.
Review before you use it. Marketing emails need a working opt-out and your physical address (CAN-SPAM). Check every fact, name and number yourself.
Take the next step. Next, see: Write a client newsletter.

Best AI tools for this task

Specialized tools first, ordered by fit for this task (never by payout), then any general AI assistant.

Jasper site ↗

AI marketing content platform with agents for end-to-end marketing workflows.

How to use it

Generate and test subject line variants in Jasper.

Copy.ai site ↗

GTM AI platform for automating copywriting and repetitive sales/marketing tasks.

How to use it

Generate subject line variants in Copy.ai.

Any AI assistant

ChatGPT Claude Google Gemini Microsoft Copilot

Paste the prompt above (short or detailed) into any of these.

Before you use it

Marketing emails need a working opt-out and your physical address (CAN-SPAM).
No guarantees, price claims or misleading superlatives.
Never paste client personal information (names, policy numbers, health or financial details) into AI tools your agency hasn't approved.
Review every AI output for accuracy and compliance before you use it.

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