Why Email Is the Highest-ROI Ecommerce Channel
Paid social and search get most of the attention, but email consistently outperforms both on ROI:
- Average email marketing ROI: £42 per £1 spent (DMA, 2024)
- Open rates for ecommerce: 18–22% for engaged lists
- Conversion rate: 3–5% for well-segmented flow emails
The reason: email reaches people who have already expressed interest in your brand (they gave you their address). You're not paying to reach strangers — you're converting warm prospects and retaining existing customers.
Platform Recommendation: Klaviyo
For Shopify brands, Klaviyo is the industry standard. It integrates natively with Shopify, syncs purchase history in real time, and has pre-built ecommerce flow templates.
Alternatives:
- Mailchimp: lower cost at small list sizes, but weaker Shopify integration and segmentation
- Omnisend: strong for omnichannel (email + SMS + push), good for brands wanting all three in one tool
- ActiveCampaign: better for B2B and complex automation, but lacks ecommerce-specific features
The Five Flows to Build First
Flows (automated sequences) generate consistent revenue without ongoing work after setup. Build these five before investing in campaigns.
Flow 1: Welcome Series (Most Important)
Triggered when someone subscribes to your email list.
Goal: introduce the brand, build trust, and convert first-time buyers.
Recommended sequence:
- Email 1 (immediate): Welcome + fulfill the lead magnet or offer that prompted signup. Brand story, what makes you different.
- Email 2 (Day 2): Social proof — reviews, press mentions, number of customers. Feature your bestseller.
- Email 3 (Day 4): Education — how to use your product, FAQ, buying guide. Removes objections for hesitant buyers.
- Email 4 (Day 7): Final offer — if they haven't bought, offer a time-limited incentive (10% off, free shipping, bonus gift with purchase).
Welcome series typically converts 3–5% of new subscribers within the first 7 days.
Flow 2: Abandoned Cart
Triggered when a shopper adds items to cart and leaves without purchasing.
Goal: recover the sale from buyers who got distracted or hesitant.
Recommended sequence:
- Email 1 (1 hour after abandonment): "You left something behind." Product image, direct link to checkout. No discount yet.
- Email 2 (24 hours): Social proof for the specific product — reviews, bestseller badge, low stock indicator if true.
- Email 3 (72 hours): Final nudge, with an optional discount (5–10%) if the product has sufficient margin.
Abandoned cart sequences typically recover 5–15% of abandoned carts.
Flow 3: Browse Abandonment
Triggered when someone views a product page but doesn't add to cart.
Goal: re-engage shoppers in the consideration phase.
Sequence: 1 email, 1–4 hours after browsing. Feature the viewed product, a brief benefit statement, and social proof. Keep it concise — this is softer intent than cart abandonment.
Browse abandonment converts at 1–3% but adds incremental revenue on top of cart abandonment without cannibalising it.
Flow 4: Post-Purchase Series
Triggered immediately after an order is placed.
Goal: reduce buyer's remorse, reduce support tickets, generate reviews, and set up the next purchase.
Recommended sequence:
- Email 1 (immediate): Order confirmation (transactional — make it beautiful, with a personal brand message).
- Email 2 (3–5 days, or on delivery): "Your order has arrived — here's how to get the most out of [product]." Usage tips, FAQ.
- Email 3 (7–10 days after delivery): Review request. Amazon's rules don't apply to your own site — you can ask for reviews freely. Link directly to the review platform.
- Email 4 (30 days): Replenishment reminder (if product is consumable) or cross-sell.
Flow 5: Win-Back (Lapsed Customers)
Triggered when a customer hasn't purchased in 90+ days.
Goal: reactivate customers who've gone cold before they churn permanently.
Sequence:
- Email 1 (90 days after last purchase): "We miss you" — remind them of what they love about your brand. Feature a bestseller they haven't tried.
- Email 2 (105 days): Special offer for returning customers — positioned as exclusive.
- Email 3 (120 days): "Last chance" email — unsubscribe option offered prominently. This cleans your list and preserves sender reputation.
Campaign Calendar: What to Send Weekly
Once your flows are live, campaigns drive incremental revenue on top. Recommended cadence:
For most ecommerce brands: 2–3 emails/week
- 1 promotional email (sale, new product, bundle)
- 1 educational or story-based email (brand content, how-to, behind-the-scenes)
- Optional: 1 curated product recommendation email
Sending more than 4 emails/week without strong segmentation damages deliverability. Unsubscribe rates rise sharply above 3 emails/week to the same unsegmented audience.
Segmentation: The Difference Between Spam and Revenue
Segmentation means sending the right email to the right subset of your list, rather than blasting everyone with the same message.
Essential segments for ecommerce:
| Segment | Definition | What to send |
|---|---|---|
| VIPs | Top 20% by lifetime value | Early access, exclusive products, loyalty rewards |
| One-time buyers | Purchased once, no repeat | Win-back campaign, cross-sell |
| Active browsers | Visited site but not purchased | Browse abandonment, educational content |
| Engaged non-buyers | Opened 5+ emails, no purchase | Strong offer + social proof |
| Lapsed subscribers | No opens in 90+ days | Re-engagement or sunset sequence |
Klaviyo builds these segments automatically from Shopify data.
Deliverability: How to Stay Out of Spam
High email volume means nothing if your emails land in spam. Key deliverability factors:
Sender reputation: Gmail and Outlook score your domain based on engagement rates. An open rate below 15% signals low-quality content to mailbox providers.
List hygiene: Remove unengaged subscribers (no opens in 180 days) regularly. Keeping dead addresses on your list hurts deliverability for everyone else.
Domain authentication: Set up DKIM, DMARC, and SPF records for your sending domain. Klaviyo provides setup instructions. Without these, your emails are more likely to be flagged as spam.
Sending domain warm-up: Never go from zero sends to 10,000/day overnight. Gradually increase volume over 4–6 weeks on a new sending domain.
Measuring Email Performance
Key metrics to track monthly:
| Metric | Target (ecommerce) |
|---|---|
| Open rate | 20–35% |
| Click rate | 2–5% |
| Conversion rate | 1–3% |
| Revenue per recipient | £0.10–£0.50 |
| Unsubscribe rate | Under 0.5% |
| Spam complaint rate | Under 0.08% |
If open rates drop below 15%, review subject line quality and list hygiene before increasing send volume.
eData4You sets up and manages Klaviyo email marketing for ecommerce brands — welcome flows, abandoned cart, campaign calendars, and list segmentation. See digital marketing services →