sales-email-marketing

What this skill does

# Email Marketing for Opt-In Subscribers

Help the user plan, build, and optimize email marketing campaigns for subscribers who opted in — covering broadcasts, nurture sequences, automation workflows, segmentation, and list management across GrooveMail, Mailchimp, ActiveCampaign, ConvertKit, Klaviyo, and other platforms.

## Step 1 — Gather context


If `references/learnings.md` exists, read it first for accumulated knowledge.

Ask the user:

1. **What's the goal?**
   - A) Welcome / onboarding new subscribers
   - B) Nurture leads toward a purchase
   - C) Promote a launch, sale, or event
   - D) Re-engage inactive subscribers
   - E) Post-purchase retention / upsell
   - F) Cart abandonment recovery
   - G) General list management or segmentation
   - H) Other — describe it

2. **What does your list look like?**
   - Approximate list size
   - How subscribers joined (lead magnet, checkout, webinar, organic, etc.)
   - Current engagement level (healthy, declining, unknown)

3. **What platform are you using (or considering)?**
   - GrooveMail (Groove.cm), Mailchimp, ActiveCampaign, ConvertKit, Klaviyo, Drip, AWeber, GetResponse, Brevo (Sendinblue), HubSpot Marketing, or other

4. **What's your audience type?**
   - B2B or B2C
   - Product/service category
   - Typical buyer journey length

**If the user's request already provides most of this context, skip directly to the relevant step.** Lead with your best-effort answer using reasonable assumptions (stated explicitly), then ask only the most critical 1-2 clarifying questions at the end — don't gate your response behind gathering complete context.

## Step 2 — Strategy

### Email types and when to use them

| Sequence Type | Trigger | Typical Length | Goal |
|---------------|---------|----------------|------|
| **Welcome series** | New subscriber opt-in | 3-7 emails over 7-14 days | Build trust, set expectations, deliver lead magnet, introduce offer |
| **Nurture sequence** | After welcome series or lead magnet download | 5-12 emails over 2-6 weeks | Educate, build authority, move toward purchase decision |
| **Promotional / broadcast** | Manual send or scheduled | 1-3 emails per campaign | Drive action on a specific offer, event, or announcement |
| **Re-engagement** | Inactivity trigger (30-90 days no opens) | 3-5 emails over 7-14 days | Win back attention or clean list |
| **Post-purchase** | Purchase confirmation | 3-7 emails over 14-30 days | Onboard, reduce refunds, drive reviews, upsell |
| **Cart abandonment** | Cart created but not completed | 2-4 emails over 24-72 hours | Recover the sale |

### Frequency planning

- **New subscribers (first 14 days)**: Daily or every-other-day is acceptable — engagement is highest right after opt-in
- **Active nurture**: 2-3 emails per week maximum
- **Ongoing broadcasts**: 1-2 per week for most lists; 3-4 per week only for media/content brands with high engagement
- **Re-engagement**: Condensed — every 2-3 days over 1-2 weeks, then remove or suppress non-responders

### Segmentation strategies

Segment by these dimensions (in priority order):

1. **Engagement level** — Active (opened/clicked in last 30 days), Warm (31-90 days), Cold (90+ days)
2. **Source / opt-in method** — Lead magnet topic, webinar attended, product interest shown
3. **Purchase history** — Never purchased, one-time buyer, repeat customer, VIP
4. **Behavior triggers** — Pages visited, links clicked, emails opened, products viewed
5. **Demographics / firmographics** — Industry, company size, role (B2B) or location, age, interests (B2C)

### Key metrics and benchmarks

| Metric | Healthy Range | Warning | Action Needed |
|--------|--------------|---------|---------------|
| **Open rate** | 20-25%+ | 15-20% | Below 15% |
| **Click rate** | 2-5%+ | 1-2% | Below 1% |
| **Click-to-open rate** | 10-15%+ | 5-10% | Below 5% |
| **Unsubscribe rate** | Below 0.3% | 0.3-0.5% | Above 0.5% |
| **Bounce rate** | Below 1% | 1-2% | Above 2% |
| **Spam complaint rate** | Below 0.05% | 0.05-0.1% | Above 0.1% |

These benchmarks vary by industry — e-commerce and media tend to have lower open rates but higher volume; B2B SaaS tends to have higher open rates on smaller, more targeted lists.

## Step 3 — Platform-specific guidance

For platform-specific email marketing configuration (automation builders, segmentation tools, campaign setup, and platform features for Ghost, Buttondown, Mailchimp, ActiveCampaign, Kit, Klaviyo, Moosend, Sender, Constant Contact, and others), see `references/platforms.md`.

## Step 4 — Actionable guidance

### Subject line formulas

Use these proven patterns (A/B test two per send):

| Formula | Example |
|---------|---------|
| **Curiosity gap** | "The one thing killing your [desired outcome]" |
| **Benefit + specificity** | "How to [benefit] in [specific timeframe]" |
| **Question** | "Are you still [struggling with X]?" |
| **Social proof** | "How [name/company] got [specific result]" |
| **Urgency (use sparingly)** | "[X hours] left to grab [offer]" |
| **Personal / conversational** | "Quick question about your [topic]" |
| **List / number** | "5 [things] that [outcome]" |

Keep subject lines under 50 characters for mobile. Avoid ALL CAPS, excessive punctuation (!!!), and spam trigger words (free, guarantee, act now) in every email.

### Email copy structure

Follow this framework for most marketing emails:

1. **Hook (first 1-2 lines)** — Open with a question, story, bold claim, or relatable pain. This must earn the scroll.
2. **Bridge (2-4 lines)** — Connect the hook to the reader's situation. Build empathy or tension.
3. **Body (the value)** — Deliver the insight, story, tip, or offer. Keep paragraphs to 1-3 lines. Use white space aggressively.
4. **CTA (1 clear action)** — One primary call to action per email. Make it specific ("Download the template" not "Click here"). Button or text link — test both.
5. **P.S. (optional)** — Restate the CTA or add a secondary hook. P.S. lines are among the most-read parts of an email.

**Formatting rules:**
- 1-3 sentences per paragraph (mobile readability)
- Write at a 5th-8th grade reading level
- Use "you" more than "we" or "I"
- One idea per email — don't dilute with multiple topics

### CTA design

- **One primary CTA per email** — multiple CTAs reduce click rate
- Use action verbs: "Get the guide," "Start your trial," "Book your spot"
- Repeat the CTA 2-3 times in longer emails (top, middle, bottom)
- Buttons get higher click rates than text links in B2C; text links often outperform in B2B
- Create urgency when appropriate: "Spots are limited" (only if true)

### A/B testing

Test one variable at a time in this priority order:

1. **Subject line** (biggest impact on open rate) — test 2 variants on 20% of list, send winner to remaining 80%
2. **Send time** — test morning vs. afternoon, weekday vs. weekend
3. **CTA** — button vs. text link, placement, wording
4. **Email length** — short (under 150 words) vs. long (300+ words)
5. **From name** — brand name vs. personal name vs. personal + brand

Minimum sample size: 1,000 subscribers per variant for statistically meaningful results. Below that, test across multiple sends and look for patterns.

### Send time optimization

General benchmarks (always test for your specific audience):

| Audience | Best Days | Best Times |
|----------|-----------|------------|
| **B2B** | Tuesday, Wednesday, Thursday | 8-10 AM or 1-2 PM recipient's timezone |
| **B2C** | Tuesday, Thursday, Saturday | 10 AM, 1 PM, or 8 PM recipient's timezone |
| **E-commerce** | Thursday, Friday, Sunday | 10 AM or 7-9 PM recipient's timezone |

Send-time optimization features (available in most platforms) learn per-subscriber open patterns and deliver at the individually optimal time — enable this when available.

### List hygiene

Perform these maintenance tasks regularly:

- **Monthly**: Review bounce rates. Remove hard bounces immediately (most platforms do this automatically).
- **Quarterly**: Run a re-engagement