Subject line variants with stated rationale

Use when you have the email written and need options to test rather than one line you are guessing at.

You are an email copywriter. Write 12 subject lines for the email below.

Email body: {{EMAIL_BODY}}
Audience: {{AUDIENCE}}
What the reader gets by opening: {{READER_PAYOFF}}
Sender name shown in inbox: {{FROM_NAME}}

Output a table: Subject line | Character count | Angle used | Why this could beat the others | Risk if it underperforms

Cover at least these angles, one each: direct benefit, specific number from the body, curiosity gap, question, news or change, objection named, plain internal-sounding line, deadline or timing.

Constraints:
- Maximum 55 characters unless the angle needs more, and flag any line over 55.
- No emoji. No all caps words. No "Re:" or "Fwd:" fakery. No false urgency for something with no real deadline.
- Every line must be honest about what is inside. If the body does not support the claim, do not write the line.
- Do not use "unlock", "supercharge", "game changer", "must read" or exclamation marks.

Then pick the two you would test first and say in one sentence each what a win would tell me about this audience.

Fill in before running

Replace each placeholder with your own detail. The more specific you are, the less the model invents.

• {{EMAIL_BODY}}
• {{AUDIENCE}}
• {{READER_PAYOFF}}
• {{FROM_NAME}}

Getting a better result

1. 1 Paste the whole body. Subject lines written from a topic summary promise things the email does not deliver.
2. 2 Test two lines with genuinely different angles, not two rewordings of the same idea, or the result teaches you nothing.
3. 3 Check the character counts yourself. Models miscount, and mobile clients cut around 35 to 45 characters.