I've spent the last year running email campaigns for digital products. Here are 10 AI prompts I use weekly — each one targets a specific email-marketing job, and each has constraints baked in that prevent the generic, fluffy output you get from a plain "write me an email" request.
These are not theory. I ran each prompt 3+ times, tested the output against real open/click data, and cut anything that sounded like a press release. Here's what survived.
How These Prompts Are Structured
Every prompt follows the same four-part framework:
- Role — who the AI is acting as
- Context — what it needs to know
- Constraints — what it must and must not do
- Output — the exact format you want back
The constraints section is where most prompt engineering fails. "Write a welcome email" produces garbage. "Write a welcome email, under 150 words, that names one specific thing the product does that competitors don't, with no exclamation marks and no 'We are thrilled to'" produces something usable.
Let's get into the prompts.
Prompt 1: Subject Line Generator (Pain-First)
Role: You are an email marketing strategist who has written subject lines
for DTC brands averaging 45%+ open rates.
Context: I sell [PRODUCT] to [AUDIENCE]. The core pain point is [PAIN].
My brand voice is [2-3 word descriptor, e.g., "dry and direct"].
Constraints:
- Generate exactly 8 subject lines
- Maximum 9 words each
- Lead with the pain or curiosity, NOT the product name
- Ban these words: "exclusive," "limited time," "don't miss," "amazing"
- No emoji in the first 4 options; emoji allowed in options 5-8
- At least 2 options must be questions
- At least 1 option must be a single word
Output: A numbered list of 8 subject lines. After each, note in brackets
which psychological trigger it uses: [curiosity] [fear] [benefit]
[specificity] [social proof] [loss aversion].
Why it works: The pain-first constraint forces AI to stop writing "Introducing Our New Feature" and start writing "Your invoices are still getting paid late." The 9-word cap prevents run-on subject lines that get truncated on mobile.
Prompt 2: Welcome Sequence (5-Email Journey)
Role: You are a lifecycle email strategist who designs onboarding sequences
for SaaS products.
Context: New signup for [PRODUCT]. The product's one core action that
indicates long-term retention is [CORE ACTION]. Average user reaches
activation after [N] sessions.
Constraints:
- Design a 5-email welcome sequence
- Email 1: Sent immediately — deliver the one thing they signed up for
- Email 2: Sent Day 1 — guide to the core action, no feature tour
- Email 3: Sent Day 3 — one quick win they can achieve in 5 minutes
- Email 4: Sent Day 7 — social proof (one specific customer outcome)
- Email 5: Sent Day 14 — the ask (upgrade, referral, or feedback)
- Each email body: maximum 180 words
- Ban "We are excited to," "Welcome aboard," "We're thrilled"
- Each email must reference the user's stated goal from signup, not
a generic "getting started" framing
Output: For each email, provide: subject line, preview text (max 70
chars), full body in plain text, and the single CTA. Label each email
Email 1-5 with send timing.
Why it works: The sequence structure (deliver → activate → quick win → proof → ask) mirrors the highest-converting welcome flows I've measured. The 180-word cap forces discipline — welcome emails that run 400+ words get skimmed and abandoned.
Prompt 3: Win-Back Email (Honest, Not Needy)
Role: You are a retention specialist who writes win-back emails with a
measured, non-desperate tone.
Context: User [NAME] has been inactive for [DAYS] days. Last action was
[LAST ACTION]. They previously engaged with [FEATURE/CONTENT].
Constraints:
- Write exactly 3 win-back email options, each a different angle:
Option A: The "we miss you" angle (warm, but no begging)
Option B: The "new thing" angle (something changed since they left)
Option C: The "straight offer" angle (discount or bonus, no guilt)
- Maximum 120 words per email body
- Ban "We've missed you so much," "It's been a while," "Come back"
- The CTA in each must be different (resume, explore, claim)
- Include the unsubscribe option prominently — do not hide it
Output: 3 labeled email options. Each with subject line, body, and CTA.
Why it works: The three-angle approach gives you A/B test material in one pass. The "no begging" constraint prevents the cringe factor that makes win-back emails feel like a guilt trip. Honest unsubscribe placement improves deliverability.
Prompt 4: Abandoned Cart Recovery (3-Email Series)
Role: You are an e-commerce email specialist who writes cart recovery
sequences.
Context: Customer abandoned checkout for [PRODUCT] at $[PRICE].
Cart contained [ITEMS]. Average time on site before abandonment
was [MINUTES].
Constraints:
- Design a 3-email recovery series:
Email 1: Sent 2 hours after — helpful, "did something go wrong?"
Email 2: Sent 24 hours — the nudge, include one objection answer
Email 3: Sent 72 hours — the incentive (if offering one) or final nudge
- Each email: max 100 words
- Email 1 must NOT mention price or discount
- Email 2 must address the #1 objection for [PRODUCT TYPE]
- Email 3 may include a time-bound offer but must not pressure
- Ban "Don't forget," "Still thinking," "Act now"
- Each email's CTA must be different wording
Output: 3 emails. For each: send timing, subject line, body, CTA, and
the specific objection being addressed.
Why it works: The timing structure (2h / 24h / 72h) matches the conversion curves I've seen across digital product checkouts. The "no price in email 1" constraint prevents the most common mistake — leading with the discount too early, which trains customers to wait.
Prompt 5: Newsletter That Doesn't Waste the Reader's Time
Role: You are a newsletter editor with a 60%+ open rate on a weekly
publication.
Context: This week's newsletter topic is [TOPIC]. The audience is
[DESCRIPTOR]. One thing that happened this week worth covering is
[EVENT/NEWS].
Constraints:
- Total length: 400-500 words
- Structure: 1-sentence hook → 3 short sections → 1 reader question
- Hook must be a specific statement, not a question (no "Did you know...")
- Each section: one insight, one example, one takeaway
- No section headers longer than 5 words
- Ban "In this week's edition," "Let's dive in," "Here's the thing"
- Include one forward-looking question for readers to reply to
Output: Full newsletter in plain text with section breaks marked by ---.
End with a P.S. line that previews next week's topic.
Why it works: The 1-3-1 structure (hook / three sections / one question) is the tightest newsletter format I've tested. The "specific statement, not question" hook constraint is borrowed from journalism — declarative openings outperform rhetorical questions because they signal confidence.
Prompt 6: Transactional Email That Doesn't Sound Like a Robot
Role: You are a UX writer who specializes in transactional emails that
feel human without being unprofessional.
Context: Trigger event is [EVENT — e.g., "password reset," "payment
received," "trial expiring in 3 days"]. The user's emotional state is
likely [EMOTION — e.g., "frustrated they forgot their password," "relieved
the payment went through," "undecided about upgrading"].
Constraints:
- Maximum 80 words in the body
- First line must acknowledge the user's likely emotional state
- No marketing language — this is not a promotional email
- The action button text must be 3 words or fewer
- Ban "Please note that," "Kindly," "We would like to inform you"
- If the email contains a link, explain what happens after clicking
in one sentence
Output: Subject line, body text, and button label. Note the emotional
acknowledgment you used.
Why it works: Transactional emails have 8x the open rate of marketing emails but most companies waste them with robotic copy. The "acknowledge the emotional state" constraint transforms "Your password has been reset" into "Back in — here's your new password."
Prompt 7: Segmentation-Driven Promo Email
Role: You are an email marketer who segments audiences and writes
targeted promotional copy.
Context: I'm promoting [PRODUCT/CAMPAIGN]. I have 3 segments:
- Segment A: Power users who use [FEATURE] daily
- Segment B: Occasional users who logged in this week
- Segment C: Inactive users (30+ days)
Constraints:
- Write one promo email for EACH segment — 3 emails total
- Each email must reference something that segment specifically did
- Same core offer, different framing per segment
- Power users: early access / exclusive angle
- Occasional users: time-saving or new-capability angle
- Inactive users: "what's new since you last visited" angle
- Maximum 150 words each
- Ban the same opening line across all three
Output: 3 labeled emails. For each, note the segment trigger you
referenced and the CTA.
Why it works: Segmented emails get 2-3x the click rate of batch-and-blast. This prompt forces you to actually use the segmentation data instead of writing one generic promo and sending it to everyone.
Prompt 8: Re-Engagement Survey Email
Role: You are a customer research specialist who writes survey emails
that get responses.
Context: I want to understand why [SEGMENT] users are churning. I need
to ask them directly but they won't fill out a 20-question form.
Constraints:
- Write a survey invitation email
- Maximum 90 words
- Ask exactly ONE question in the email body (not a link to a form)
- The question must be answerable in one sentence
- Offer incentive: [INCENTIVE] for a reply
- Frame the question as helping YOU, not them ("I'm trying to figure
out X" not "We value your feedback")
- Ban "We'd love to hear from you," "Your feedback matters," "Take
our quick survey"
Output: Subject line, body text, and the single question. Note what
incentive you're offering.
Why it works: The "one question in the email body" constraint is the single highest-impact change you can make to survey response rates. People reply to emails; they don't click through to Typeform. The "help me, not you" framing works because it's honest.
Prompt 9: Product Launch Email (Without the Hype Spiral)
Role: You are a product marketer who writes launch emails for
developer tools and SaaS products.
Context: Launching [FEATURE/PRODUCT] on [DATE]. The core value is
[ONE SENTENCE]. Three things it does that the old version didn't:
[1], [2], [3].
Constraints:
- Write a launch announcement email
- Maximum 200 words
- Structure: what changed (1 sentence) → why it matters (2 sentences)
→ what you can do now (bullet list) → one CTA
- No superlatives: ban "revolutionary," "game-changing," "powerful,"
"seamless," "robust"
- The three "what you can do now" bullets must be actions, not features
(start with verbs)
- The CTA must name the specific action, not "Learn More"
Output: Subject line, preview text, body with bullet list, CTA.
Why it works: Launch emails spiral into hype because writers list features instead of actions. The "actions, not features" constraint transforms "New Dashboard with Real-Time Analytics" into "See your metrics update the moment they change." The superlative ban prevents the AI from defaulting to marketing-speak.
Prompt 10: Post-Purchase Email (The One Most Brands Skip)
Role: You are a post-purchase lifecycle strategist.
Context: Customer just bought [PRODUCT] for $[PRICE]. The biggest risk
to retention is [RISK — e.g., "they don't use it in the first 48 hours,"
"they expected something different," "they forget they bought it"].
Constraints:
- Write a post-purchase email sent 15 minutes after purchase
- Maximum 120 words
- Do NOT say "thank you for your purchase" in the first line
- First line must deliver the one thing they need to do RIGHT NOW
to get value from the purchase
- Include one specific tip that prevents the biggest retention risk
- No upsell — this email is about activation, not revenue
- Ban "Congratulations," "You're all set," "Welcome to the family"
Output: Subject line, body text, the one immediate action, and the
retention tip.
Why it works: The post-purchase email is the highest-open-rate email in any sequence (60%+), yet most brands waste it on "Thanks for your order!" The "don't say thank you" constraint forces the email to be useful instead of ceremonial.
How I Test Email Prompts Before Sending
I run each prompt 3 times with the same inputs. If the outputs vary wildly in quality, the prompt is too loose — I tighten the constraints. If the outputs are identical, the prompt is too rigid — I loosen slightly to allow variation.
Then I read each email out loud. If it sounds like a press release, I cut it. If it sounds like something I'd actually send to a friend, it's ready.
The prompts above are the ones that survived that filter across dozens of campaigns. Steal them, adapt the bracketed fields, and start measuring.
Want more tested prompts like these? I maintain a library of 200+ AI prompts for marketing, sales, product management, and engineering work — each one tested with the same methodology. Check out the full prompt pack here.
If email marketing is your focus, the SaaS Marketing Copy Prompt Pack includes 25 prompts specifically for landing pages, ad copy, and conversion-focused email sequences.
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