Email subject lines and preview text

Generate subject line and preview text pairs across several honest angles, with notes on what each is testing.

Change note: Initial version

Prompt

Write subject lines and preview text for an email campaign.

Email type: {{email_type}}
What the email says or offers: {{content}}
Audience and what they already know about us: {{audience}}
Brand voice: {{voice}}
Words or tactics to avoid: {{avoid}}
Number of pairs: {{count}}

Requirements
- Subject lines under 50 characters, preview text under 90 characters. The preview should add information, not repeat the subject.
- Each pair uses a different angle: benefit, specific number or detail, question, curiosity with a real payoff, plain announcement, personalization that is true. Label the angle.
- The subject must be an accurate promise of what is inside. No misleading "Re:" or "Fwd:", no fake urgency, no ALL CAPS, no spam-trigger style punctuation, at most one emoji and only if it suits the voice.
- Mix at least two lowercase or conversational options and two more formal ones.

Output a table: #, Angle, Subject, Subject chars, Preview, Preview chars, What it tests. Then recommend an A/B test pair and say what result would show which approach to use going forward. Mention that I should check final rendering in my email tool.

Variables

• {{email_type}}Email typeselect

  Options: Newsletter, Product update, Promotion or sale, Welcome email, Webinar invite, Re-engagement

  Default: Newsletter

• {{content}}What the email sayslong

  Default: This month's newsletter: a new free kickoff meeting template, a short guide on spotting overbooked weeks, and a customer story from a 12-person studio.

• {{audience}}Audiencetext

  Default: Subscribers who are agency project managers; they signed up for our templates

• {{voice}}Voicetext

  Default: Practical, friendly, a bit dry

• {{avoid}}Avoidtext

  Default: Exclamation marks, 'don't miss out', and fake urgency

• {{count}}Number of pairsnumber

  Default: 6

Example output

| # | Angle | Subject | S | Preview | P | Tests |
|---|---|---|---|---|---|---|
| 1 | Benefit | A kickoff agenda you can copy | 29 | Plus how to spot overbooked weeks before they bite | 51 | Plain benefit |
| 2 | Specific detail | 60 minutes, 6 agenda items | 26 | The kickoff template our readers keep asking for | 49 | Numbers |
| 3 | Question | Who on your team is overbooked? | 31 | A two-minute check, and a free template inside | 47 | Question |
| 4 | Curiosity | What a 12-person studio changed | 31 | One planning habit, and the results they saw | 45 | Story pull |
| 5 | Announcement | October newsletter: templates and a case study | 46 | Three useful things, no fluff | 29 | Plain label |
| 6 | Personal | for project managers who hate chasing status | 44 | Our latest guide, template and customer story | 46 | Lowercase voice |

**Suggested A/B test:** #1 against #4. If #1 wins on opens and clicks, your audience responds to concrete utility; if #4 wins, stories drive attention, so lead with case studies. Check rendering in your email tool, as inbox clients truncate differently.

Notes

The tests column reminds you that every subject line is an experiment, so each send teaches you something. Give it your last five best and worst subject lines to calibrate its style.