Email Marketing Still Delivers the Highest ROI
Despite the rise of social media, chatbots, and new marketing channels, email marketing remains the highest-ROI channel for most businesses. The numbers speak for themselves:
- $36 average return for every $1 spent on email marketing
- 44% of marketing professionals cite email as their most effective channel
- 4 billion daily email users globally (and growing)
In New Zealand, email marketing is governed by the Unsolicited Electronic Messages Act 2007, which requires clear consent and easy unsubscribe options. Following these regulations isn't just legal compliance — it's good practice that builds trust and improves performance.
Building Your Email List (The Right Way)
Your email list is an asset you own. Unlike social media followers (which platforms can take away), your email list is yours.
Permission-Based List Building
Never buy email lists. Purchased lists have:
- Low engagement rates (people didn't ask to hear from you)
- High spam complaint rates (damages your sender reputation)
- Poor deliverability (ISPs flag emails to unengaged recipients)
- Legal risks (violates anti-spam laws in most jurisdictions)
Effective Lead Magnets
Offer something valuable in exchange for an email address:
High-Converting Lead Magnets:
- Checklists and templates — actionable, immediately useful
- Industry reports and research — exclusive data or insights
- Free tools or calculators — ROI calculators, assessments, generators
- Email courses — 5-7 day educational series
- Webinar or workshop access — live or recorded training
- Discounts or exclusive offers — for e-commerce
Lead Magnet Best Practices:
- Solve one specific problem (not everything)
- Deliver value immediately (no waiting)
- Make it easy to consume (PDF, checklist, video)
- Align with your paid offering (qualify leads)
- Create a dedicated landing page for each lead magnet
Signup Form Optimization
Reduce friction:
- Ask for email only (add name if absolutely necessary)
- Clear value proposition above the form
- Single-column layout
- Large, contrasting submit button
- Privacy assurance ("We respect your privacy — no spam")
Strategic placement:
- Popup (exit-intent or time-delayed, not immediate)
- Inline within blog content
- Footer of every page
- Dedicated landing pages
- Social media bio links
Email Segmentation: The Performance Multiplier
Segmentation is the practice of dividing your email list into smaller groups based on shared characteristics. Segmented campaigns generate 58% of all email revenue despite being a fraction of total sends.
Segmentation Strategies
Demographic Segmentation:
- Location (city, region, country)
- Industry or job role (for B2B)
- Company size (for B2B)
- Age or gender (where relevant)
Behavioral Segmentation:
- Purchase history (customers vs. non-customers)
- Website activity (pages visited, time on site)
- Email engagement (opens, clicks, no engagement)
- Product interests (which products they've viewed)
- Cart abandonment status
Lifecycle Stage:
- New subscribers (welcome series)
- Active customers (retention campaigns)
- Lapsed customers (win-back campaigns)
- VIP customers (exclusive offers)
Engagement Level:
- Highly engaged (opens/clicks regularly)
- Moderately engaged (occasional interaction)
- Inactive (no engagement in 90+ days)
Implementing Segmentation
Most email platforms (Mailchimp, Klaviyo, ActiveCampaign, HubSpot) offer segmentation features:
- Tag subscribers based on actions (link clicks, form submissions, purchases)
- Create segments using combinations of tags and data
- Send targeted campaigns to specific segments
- Automate segment assignment based on behavior
Example segments for an e-commerce store:
- First-time buyers in the last 30 days
- Customers who bought Product A but not Product B
- Subscribers who clicked on a specific product category
- VIP customers (3+ purchases or $500+ lifetime value)
- Cart abandoners from the last 7 days
Email Automation: Work Smarter, Not Harder
Automation handles repetitive tasks and delivers timely, relevant messages based on subscriber behavior.
Essential Automated Workflows
1. Welcome Series (3-5 emails)
Triggered when someone subscribes. Sets expectations and builds the relationship.
- Email 1 (immediate): Deliver the lead magnet, introduce yourself
- Email 2 (day 2): Share your best content or customer success story
- Email 3 (day 4): Explain your products/services
- Email 4 (day 7): Social proof and testimonials
- Email 5 (day 10): Clear offer or next step
2. Abandoned Cart Series (3 emails)
Triggered when someone adds to cart but doesn't complete purchase.
- Email 1 (1 hour): "You left something behind" — simple reminder
- Email 2 (24 hours): Address objections, add urgency
- Email 3 (48 hours): Offer incentive (discount, free shipping)
3. Post-Purchase Series
Triggered after a purchase.
- Email 1 (immediate): Order confirmation and thank you
- Email 2 (3-7 days): How to get the most from your purchase
- Email 3 (14-30 days): Request review or testimonial
- Email 4 (30-60 days): Cross-sell or upsell related products
4. Re-engagement Campaign
Triggered when a subscriber hasn't engaged in 60-90 days.
- Email 1: "We miss you" — special offer or content
- Email 2 (7 days later): "Last chance" — final attempt
- Email 3 (7 days later): "Update your preferences or unsubscribe"
5. Lead Nurture Sequence (B2B)
Triggered when someone downloads a lead magnet but isn't ready to buy.
- Educational content addressing pain points
- Case studies and social proof
- Product demos or webinar invitations
- Gradual progression toward a sales conversation
Writing Email Copy That Converts
Subject Lines
Your subject line determines whether the email gets opened. Aim for 20-30% open rates.
Subject Line Formulas:
- Curiosity: "The mistake 90% of businesses make with email"
- Urgency: "Last chance: Offer ends tonight"
- Personalization: "[Name], here's your custom marketing plan"
- Benefit-driven: "Double your email ROI in 30 days"
- Question: "Struggling to get email opens?"
- Numbers: "5 ways to improve your email deliverability"
Subject Line Best Practices:
- Keep under 50 characters (mobile truncation)
- Avoid spam triggers (FREE, !!!, ALL CAPS)
- Test with and without emojis (can boost opens 15-20%)
- Personalize when possible (name, company, location)
- A/B test consistently
Email Body Copy
Structure:
- Preheader text — the preview text after the subject line (optimize this!)
- Opening — address the reader, state the benefit
- Body — deliver value, tell a story, make your case
- CTA — one clear action you want them to take
- P.S. — reinforce the CTA or add urgency
Copywriting Principles:
- Write like you speak — conversational, not corporate
- One idea per email — don't try to cover everything
- Short paragraphs — 1-3 sentences max
- Use "you" more than "we" — make it about the reader
- Lead with benefits, not features — what's in it for them?
- Include a single, clear CTA — don't give 5 options
- Create urgency — time-limited offers, scarcity, FOMO
Call-to-Action Best Practices
- One primary CTA per email — don't dilute focus
- Button + text link — some people prefer clicking links
- Action-oriented language — "Get My Free Guide" not "Click Here"
- Contrasting button color — make it stand out
- Repeat the CTA — once in the middle, once at the end
Email Design and Formatting
Mobile-First Design
Over 60% of emails are opened on mobile devices. Design for mobile first.
- Single-column layout — easy to read on small screens
- Large, tappable buttons — minimum 44x44 pixels
- Readable font size — 14-16px for body text
- Compressed images — fast loading on mobile data
- Short subject lines — avoid truncation on mobile
Plain Text vs. HTML
Plain text emails:
- Higher deliverability (fewer spam triggers)
- More personal feel
- Better for B2B and relationship-building
- Easier to create
HTML emails:
- Better for visual brands (e-commerce, lifestyle)
- Can include images, buttons, formatting
- Track opens (via tracking pixel)
- More design flexibility
Best practice: Send both (multipart emails) and let the recipient's email client choose.
Email Deliverability: Getting to the Inbox
The best email in the world is worthless if it lands in spam.
Technical Setup
SPF, DKIM, and DMARC:
- Authentication protocols that prove you're a legitimate sender
- Set up through your DNS records
- Most email platforms provide setup instructions
- Check your setup at mail-tester.com
Dedicated Sending Domain:
- Use a subdomain for email (e.g., mail.yourdomain.com)
- Protects your main domain reputation
- Easier to troubleshoot deliverability issues
Maintaining Sender Reputation
Clean your list regularly:
- Remove hard bounces immediately
- Remove subscribers who haven't engaged in 6+ months
- Use double opt-in to ensure valid addresses
- Monitor spam complaint rates (keep under 0.1%)
Avoid spam triggers:
- Don't use ALL CAPS or excessive punctuation!!!
- Avoid spam words (FREE, GUARANTEE, ACT NOW, CLICK HERE)
- Balance text-to-image ratio (don't send image-only emails)
- Include a physical address in your footer (legal requirement)
- Make unsubscribe easy and obvious
Warm up new sending domains:
- Start with small volumes to engaged subscribers
- Gradually increase send volume over 2-4 weeks
- Monitor engagement and deliverability metrics
Measuring Email Marketing Performance
Key Metrics
| Metric | What It Measures | Good Benchmark | |--------|------------------|----------------| | Open Rate | % who opened the email | 20-30% | | Click-Through Rate (CTR) | % who clicked a link | 2-5% | | Click-to-Open Rate (CTOR) | % of openers who clicked | 10-15% | | Conversion Rate | % who completed desired action | 1-5% | | Bounce Rate | % of emails that didn't deliver | Under 2% | | Unsubscribe Rate | % who opted out | Under 0.5% | | List Growth Rate | Net new subscribers | 2-5% monthly |
Attribution and ROI
Track revenue attribution:
- Use UTM parameters in email links
- Set up conversion tracking in Google Analytics
- Use your email platform's e-commerce integration
- Track both direct revenue and assisted conversions
Calculate email marketing ROI:
ROI = (Revenue from email - Email marketing costs) / Email marketing costs × 100
Include costs: email platform subscription, design/copywriting time, list growth tools.
Email Marketing Compliance (NZ)
The Unsolicited Electronic Messages Act 2007 requires:
- Consent — clear permission to send marketing emails
- Identification — clearly identify yourself as the sender
- Unsubscribe mechanism — functional unsubscribe link in every email
- Privacy policy — explain how you use subscriber data
Best practices:
- Use double opt-in for new subscribers
- Keep records of consent
- Honor unsubscribe requests immediately
- Include your physical business address
- Be transparent about email frequency
Common Email Marketing Mistakes
- Sending to everyone — segment for relevance
- Inconsistent sending — establish a regular cadence
- No clear CTA — every email should have a purpose
- Ignoring mobile — over 60% open on mobile
- Not testing — A/B test subject lines, send times, CTAs
- Buying lists — always build organically
- No automation — leaving money on the table
- Neglecting deliverability — technical setup matters
- Too promotional — balance value and promotion (80/20 rule)
- Not cleaning your list — inactive subscribers hurt deliverability
90-Day Email Marketing Launch Plan
Month 1: Foundation
- Choose and set up email platform
- Configure SPF, DKIM, DMARC
- Create lead magnet and landing page
- Build welcome series (3-5 emails)
- Set up signup forms on website
Month 2: Growth and Automation
- Launch lead magnet promotion
- Build abandoned cart series (if e-commerce)
- Create post-purchase series
- Segment list by engagement level
- Send first broadcast campaign
Month 3: Optimization
- Analyze performance data
- A/B test subject lines and CTAs
- Build re-engagement campaign
- Refine segmentation strategy
- Scale what's working
Email marketing in 2026 rewards personalization, automation, and genuine value. Build your list ethically, segment strategically, and focus on delivering content your subscribers actually want to receive.