email-sequence

name	email-sequence
description	Design and write complete email automation sequences for SaaS and B2B products. Covers welcome/onboarding, lead nurture, re-engagement, post-purchase, trial expiration, and sales sequences. Outputs ready-to-send drafts with subject lines, preview text, full body copy, CTAs, timing, and segmentation logic. Use when building drip campaigns, improving trial-to-paid conversion, or designing lifecycle email programs.
license	MIT + Commons Clause
metadata	{"version":"1.0.0","author":"borghei","category":"marketing","domain":"email-marketing","updated":"2026-03-09T00:00:00.000Z","frameworks":"email-automation, lifecycle-marketing, drip-campaigns"}

Email Sequence Design

Category: Marketing Tags: email sequences, drip campaigns, nurture flows, onboarding emails, lifecycle marketing, automation

Overview

Email Sequence Design creates complete, ready-to-implement email automation flows. Every output includes subject lines, preview text, full body copy, CTAs, send timing, and exit conditions. The goal is sequences that nurture relationships and drive specific conversion actions -- not just "stay top of mind" email noise.

This skill writes the sequences. For email HTML templates and rendering infrastructure, use email-template-builder. For tracking email performance, use analytics-tracking.

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Sequence Types

Type	Trigger	Goal	Typical Length
Welcome/Onboarding	New signup	Activate user, show core value	5-7 emails over 14 days
Trial Expiration	Trial nearing end	Convert to paid	4-5 emails over 7 days
Lead Nurture	Content download, webinar	Qualify and convert	6-8 emails over 30 days
Re-engagement	Inactive 30+ days	Bring back or clean list	3-4 emails over 14 days
Post-Purchase	Subscription start	Reduce churn, expand	4-6 emails over 30 days
Event-Based	Specific user action	Drive next action	2-3 emails over 7 days
Sales (Warm)	MQL or PQL signal	Book meeting or start trial	4-5 emails over 14 days

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Design Process

Step 1: Define Sequence Architecture

Before writing any email, define the architecture:

Sequence Name:     [Name]
Trigger:           [What starts the sequence]
Primary Goal:      [Single conversion action]
Secondary Goals:   [Relationship building, data collection]
Length:            [Number of emails]
Duration:          [Total time span]
Exit Conditions:   [When they leave the sequence]
Suppression:       [Other sequences to suppress while active]

Step 2: Map the Emotional Journey

Each email serves a purpose in a progression:

Email	Emotional State	Purpose	Key Message
1	Curious, uncertain	Welcome, set expectations	"Here's what to expect"
2	Exploring, evaluating	Demonstrate core value	"Here's the one thing to try first"
3	Engaged or dropping off	Social proof	"Here's how others succeeded"
4	Considering commitment	Remove objections	"Common concerns addressed"
5	Ready to decide	Create urgency	"Your trial ends in X days"

Step 3: Write Each Email

For every email in the sequence, deliver:

Email [#]: [Name/Purpose]
Send:     [Timing from trigger or previous email]
Segment:  [Conditions -- who receives this variant]

Subject:  [Subject line - under 50 characters]
Preview:  [Preview text - 80-120 characters, complements subject]

Body:
[Complete copy -- not an outline, not bullets, the actual words]

CTA:      [Button text] → [Destination URL]
P.S.:     [Optional -- works for urgency or human touch]

Step 4: Define Branching Logic

Not everyone follows the same path. Define branches:

After Email 2:
  IF user activated core feature → Skip to Email 4 (post-activation)
  IF user has not logged in → Send Email 2B (re-engagement variant)
  IF user unsubscribed → Exit sequence

After Email 4:
  IF user converted → Exit sequence, enter post-purchase sequence
  IF user visited pricing 2+ times → Send Email 4B (pricing objection handler)
  ELSE → Continue to Email 5

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Sequence Blueprints

Blueprint: SaaS Welcome/Onboarding (7 emails, 14 days)

Email	Day	Subject	Purpose
1	0 (immediate)	Welcome to [Product] -- start here	Set expectations, one CTA to activate
2	1	The one feature that changes everything	Drive to core value action
3	3	How [Company] got [Result] in [Timeframe]	Social proof, case study
4	5	Quick question	Check engagement, offer help
5	7	3 things you might have missed	Feature discovery, breadth
6	10	Your trial is halfway done	Progress report, urgency
7	13	Last day of your trial	Convert or lose access

Exit conditions: User converts to paid at any point, user unsubscribes, user explicitly requests removal.

Branching:

• After Email 2: If user completed core action, skip Email 3, go to Email 4
• After Email 4: If user has not logged in for 5+ days, switch to re-engagement variant
• After Email 6: If user visited pricing page, send pricing-focused Email 7 variant

Blueprint: Lead Nurture (6 emails, 30 days)

Email	Day	Subject	Purpose
1	0	Your [resource name] is ready	Deliver promised content
2	3	The mistake most [role] make with [topic]	Educational, establish authority
3	7	[Company] went from [problem] to [result]	Case study, social proof
4	14	The [topic] framework we use internally	Exclusive value, reciprocity
5	21	Quick question about [their challenge]	Personal, segmentation
6	28	See if [Product] is right for you	Soft CTA, demo or trial

Exit conditions: Books demo, starts trial, unsubscribes, or completes sequence.

Blueprint: Re-engagement (4 emails, 14 days)

Email	Day	Subject	Purpose
1	0	We noticed you've been away	Acknowledge absence, show value
2	3	Here's what you missed	Product updates, new features
3	7	[Exclusive offer or incentive]	Incentivize return
4	14	Should we stop emailing you?	Clean list, last chance

Critical rule: If no engagement after Email 4, remove from active email list. Sending to unengaged contacts damages sender reputation.

Blueprint: Trial Expiration (5 emails, 7 days)

Email	Day Before Expiry	Subject	Purpose
1	7	Your trial ends in one week	Awareness, usage summary
2	3	Here's what you'll lose access to	Loss aversion, feature list
3	1	Tomorrow is your last day	Urgency, simple CTA
4	0	Your trial just ended	Conversion, offer extension option
5	+3	We saved your data for 30 days	Last chance, data retention

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Subject Line Framework

Formulas That Work

Formula	Example	Why It Works
How [company] [achieved result]	"How Stripe reduced churn 23%"	Specific, curiosity, social proof
The [number] [thing] [audience] [needs]	"The 3 metrics every PM tracks"	Specific, relevant, scannable
Quick question about [topic]	"Quick question about your trial"	Personal, non-threatening
[Name], [action-oriented statement]	"Sarah, your dashboard is ready"	Personal, action-oriented
Your [asset] is [status]	"Your free trial ends tomorrow"	Ownership, urgency

Subject Line Rules

1. Under 50 characters (mobile truncation happens at 35-45)
2. No ALL CAPS words
3. No excessive punctuation (!!!)
4. No spam trigger words in subject: free, guarantee, limited time, act now
5. Preview text must complement, not repeat, the subject
6. A/B test subject lines on every sequence (minimum 3 variants per email)

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Timing & Cadence

Optimal Send Times (B2B SaaS)

Day	Time Window	Notes
Tuesday	9-11 AM recipient's timezone	Highest open rates
Wednesday	9-11 AM	Second best
Thursday	9-11 AM	Good for follow-ups
Monday	10 AM-12 PM	After inbox clearing
Friday	Avoid for important emails	Low engagement
Weekend	Avoid for B2B	Exception: consumer products

Sequence Spacing Rules

• Welcome email: Immediate (within 5 minutes of trigger)
• Onboarding emails: Every 1-3 days (maintain momentum)
• Nurture emails: Every 3-7 days (avoid fatigue)
• Re-engagement: Every 3-5 days (test urgency vs respect)
• Trial expiration: Accelerating cadence (7 days, 3 days, 1 day, 0, +3)

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Metrics & Benchmarks

Expected Performance by Sequence Type

Metric	Welcome	Nurture	Re-engagement	Trial Expiration
Open rate	50-70%	25-40%	15-25%	40-60%
Click rate	10-20%	3-8%	2-5%	8-15%
Conversion rate	5-15%	1-3%	3-8%	10-25%
Unsubscribe rate	<0.5%	<0.3%	1-3%	<0.5%

Health Indicators

Signal	Meaning	Action
Open rate declining across sequence	Fatigue or irrelevance	Shorten sequence or improve subject lines
High opens, low clicks	Subject works, body/CTA doesn't	Rewrite body copy, simplify CTA
High click rate, low conversion	Landing page problem	Audit post-click experience
Rising unsubscribes after Email 3	Too frequent or too salesy	Increase spacing, add more value
Email 1 open rate below 40%	Deliverability issue	Check sender reputation, authentication

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Segmentation Strategy

Behavioral Segments

Segment	Definition	Sequence Adjustment
Power users	Used core feature 5+ times	Skip beginner content, focus on advanced features
Window shoppers	Signed up, never activated	More hand-holding, simpler first steps
Pricing page visitors	Viewed pricing 2+ times	Address pricing objections directly
Feature explorers	Used 3+ features	Highlight integration and workflow value
Ghost users	No login in 7+ days	Re-engagement sequence

Personalization Tiers

Tier	Effort	Impact	Example
1: Name + company	Low	Moderate	"Hi Sarah, how's the Acme team finding..."
2: Behavioral	Medium	High	"Since you set up your first project..."
3: Segment-specific copy	High	Highest	Entirely different email body per segment

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Implementation Checklist

• Sequence architecture documented (trigger, goal, length, exits)
• All emails written with subject, preview, body, CTA
• Branching logic defined for key decision points
• Subject line A/B variants created (minimum 3 per email)
• UTM parameters configured for all links
• Suppression rules set (no overlapping sequences)
• Unsubscribe handling confirmed (one-click, CAN-SPAM compliant)
• Plain text version created for each email
• Send time optimized for recipient timezone
• Metrics dashboard configured (opens, clicks, conversions, unsubs)
• 30-day post-launch review scheduled

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Proactive Triggers

• User mentions low trial-to-paid conversion: ask about trial expiration email sequence before recommending pricing changes
• User reports high open rates but low clicks: diagnose body copy and CTA before blaming subject lines
• User wants to "do email marketing": clarify sequence type before writing anything
• User has a product launch coming: recommend coordinating launch email sequence with in-app messaging
• User mentions list going cold: suggest re-engagement sequence before recommending acquisition spend

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Related Skills

Skill	Use When
email-template-builder	Building HTML email templates and rendering infrastructure
analytics-tracking	Setting up email click tracking and UTM attribution
launch-strategy	Coordinating email sequences around product launches
content-creator	Writing landing page copy that email CTAs point to
ab-test-setup	Designing statistically valid email A/B tests

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Troubleshooting

Symptom	Likely Cause	Fix
Welcome email open rate below 40%	Deliverability issue or weak subject line	Check sender reputation and SPF/DKIM/DMARC. Test subject variants.
Open rates declining across sequence	Fatigue or irrelevance	Shorten sequence, improve subject lines, or add more value per email.
High opens, low clicks	Body copy or CTA is weak	Rewrite body with stronger benefit and simplify CTA to one action.
High click rate, low conversion	Landing page problem	Audit post-click experience: message match, page speed, form friction.
Rising unsubscribes after email 3	Too frequent or too salesy	Increase spacing between emails and add more educational content.
Emails clipped by Gmail	HTML template over 102KB	Use render_size_analyzer.py from email-template-builder to reduce size.
Sequence not triggering	Automation platform misconfiguration	Verify trigger events, check suppression rules for conflicts.

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Success Criteria

• Welcome sequence open rate above 50% (benchmark: 50-70%)
• Nurture sequence click-through rate above 3% (benchmark: 3-8%)
• Trial expiration conversion rate above 10% (benchmark: 10-25%)
• Unsubscribe rate below 0.5% per email (below 0.3% for nurture)
• Every email has 3+ subject line A/B variants tested
• Branching logic covers at least 2 behavioral segments per sequence
• Sequence-level conversion rate (total conversions / initial sends) above 5%

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Scope & Limitations

In Scope: Lifecycle email sequence design, copy, timing, branching logic, segmentation, and performance optimization for SaaS/B2B.

Out of Scope: Email HTML rendering (use email-template-builder), cold outreach sequences (use cold-email), marketing automation platform setup, transactional email infrastructure.

Limitations: Benchmarks are SaaS/B2B focused. Adjust thresholds for e-commerce, consumer, or other verticals.

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Python Automation Tools

1. Subject Line Scorer (scripts/subject_line_scorer.py)

Scores sequence email subject lines for open-rate potential and auto-detects sequence type (welcome, trial, nurture, re-engagement).

python scripts/subject_line_scorer.py "Your trial ends tomorrow"
python scripts/subject_line_scorer.py --file subjects.txt --json

2. Sequence Mapper (scripts/sequence_mapper.py)

Generates a visual sequence map with timing, branching logic, and exit conditions from a sequence definition.

python scripts/sequence_mapper.py sequence_def.json
python scripts/sequence_mapper.py --sample --json

3. Performance Analyzer (scripts/performance_analyzer.py)

Analyzes email sequence metrics against benchmarks, identifies bottlenecks, and recommends optimizations.

python scripts/performance_analyzer.py metrics.json
python scripts/performance_analyzer.py --sample --json