Email marketing is the highest-ROI channel for e-commerce. It is not even close. For every £1 spent on email, the average e-commerce brand generates between £35 and £45 in return. But that return does not come from sending weekly newsletters to your entire list. It comes from automated flows: sequences of emails triggered by specific customer behaviours.
Automated flows run in the background, 24 hours a day, generating revenue while you focus on other parts of the business. The best part is that you set them up once and they keep working for months or years with minimal maintenance. Here are the seven flows every e-commerce brand needs, with specific subject lines, timing recommendations, and the metrics you should expect.
1. Welcome Series
The welcome series is triggered when someone subscribes to your email list, whether through a popup, footer signup, or account creation. This is your first impression and typically your highest-performing flow by open rate.
Structure (3 to 4 emails over 7 days):
- Email 1 (immediately):Deliver the promised incentive (discount code, free guide). Introduce your brand story briefly. Subject line example: "Welcome to [Brand]. Here is your 10% off."
- Email 2 (day 2):Share your brand values, what makes you different, and your best-selling products. Subject line example: "Why 50,000 customers choose [Brand]"
- Email 3 (day 4):Social proof. Customer reviews, press mentions, user-generated content. Subject line example: "Don't just take our word for it"
- Email 4 (day 7):Urgency on the welcome discount if they have not purchased. Subject line example: "Your 10% off expires tomorrow"
Expected metrics: 45 to 55% open rate, 8 to 12% click rate, 3 to 5% conversion rate. If your welcome series is below these benchmarks, test your subject lines and the clarity of your first email.
2. Abandoned Cart
The abandoned cart flow is almost always the highest revenue-generating flow for e-commerce brands. It targets people who added products to their basket but did not complete checkout. On average, 70% of e-commerce carts are abandoned. Even recovering a small percentage of these represents significant revenue.
Structure (3 emails over 48 hours):
- Email 1 (1 hour after abandonment):Simple reminder with the product image and a link back to cart. No discount. Subject line example: "You left something behind"
- Email 2 (24 hours):Address common objections. Include trust signals: free returns, customer reviews, secure checkout. Subject line example: "Still thinking about it?"
- Email 3 (48 hours):Final reminder. Consider a small incentive if margins allow (free shipping or 5 to 10% off). Subject line example: "Last chance: your basket expires soon"
A note on discounting: Resist the urge to lead with a discount in email 1. If customers learn they get a discount every time they abandon a cart, they will start doing it deliberately. Only introduce a discount in the final email, and keep it modest.
Expected metrics: 40 to 50% open rate, 10 to 15% click rate, 5 to 10% recovery rate. A well-built abandoned cart flow can recover 8 to 15% of abandoned carts.
3. Post-Purchase
The post-purchase flow is your opportunity to build a relationship, encourage reviews, and set up the next sale. Most brands neglect this flow entirely, which is a mistake. The customer has just given you money. They are at peak brand affinity. Use that moment wisely.
Structure (3 to 4 emails over 14 days):
- Email 1 (immediately after purchase):Order confirmation with delivery expectations. Keep it transactional but warm. Subject line example: "Order confirmed. Here is what happens next."
- Email 2 (delivery day + 2):Check in. Ask if everything arrived in good condition. Share care instructions or usage tips for the product. Subject line example: "How is everything? Quick tips for your [product]"
- Email 3 (delivery day + 7):Review request. Make it easy with a direct link to leave a review. Explain that reviews help other customers. Subject line example: "Loving your [product]? Leave a quick review"
- Email 4 (delivery day + 14):Cross-sell. Recommend complementary products based on what they purchased. Subject line example: "Customers who bought [product] also love these"
Expected metrics: 50 to 65% open rate (transactional emails have the highest open rates), 5 to 8% review submission rate, 2 to 4% cross-sell conversion rate.
4. Win-Back
The win-back flow targets customers who have not purchased in a specified period. The exact trigger depends on your product and typical repurchase cycle. For most e-commerce brands, triggering after 60 to 90 days of inactivity works well. For consumable products with shorter cycles, 30 to 45 days is more appropriate.
Structure (3 emails over 14 days):
- Email 1 (trigger day):Soft re-engagement. Show what is new since their last purchase. Subject line example: "It has been a while. Here is what you have missed."
- Email 2 (day 7):Offer an incentive. A modest discount or free shipping. Subject line example: "We miss you. Here is 15% off your next order."
- Email 3 (day 14):Final attempt with urgency on the offer. If they do not engage, consider suppressing them from future flows to protect your deliverability. Subject line example: "Last chance for 15% off, [First Name]"
Expected metrics: 25 to 35% open rate, 3 to 5% click rate, 1 to 3% conversion rate. Win-back flows have lower engagement than other flows, but the revenue they recover from lapsed customers makes them well worth building.
5. Browse Abandonment
Browse abandonment targets people who viewed specific products on your site but did not add anything to their cart. This is a higher-funnel flow than abandoned cart, reaching people who showed interest but did not commit. It works particularly well for considered purchases where shoppers need multiple touchpoints before buying.
Structure (2 emails over 48 hours):
- Email 1 (4 to 6 hours after browsing):Show the products they viewed with images and prices. Keep it casual. Subject line example: "Still interested in [product name]?"
- Email 2 (24 to 48 hours):Add social proof for the products they viewed. Customer reviews, star ratings, or "bestseller" badges. Subject line example: "[Product name] is one of our most popular picks"
Expected metrics: 30 to 40% open rate, 4 to 7% click rate, 1 to 2% conversion rate. Lower conversion than abandoned cart, but it captures a larger audience.
6. Replenishment and Reorder
If you sell consumable or replenishable products (skincare, supplements, coffee, pet food, cleaning supplies), the replenishment flow is one of the most powerful tools for driving repeat purchases. It is triggered based on the estimated time it takes a customer to use up the product they bought.
Structure (2 emails):
- Email 1 (estimated reorder time minus 5 days):A friendly reminder that they are likely running low. Include a direct reorder link. Subject line example: "Running low on [product]? Reorder before you run out."
- Email 2 (estimated reorder time):More direct reminder. Consider offering a small incentive for setting up a subscription. Subject line example: "Your [product] supply is probably running out about now"
Timing calculation: For a 30-day supply of supplements, send email 1 on day 25 and email 2 on day 30. For a 90ml bottle of serum that lasts approximately 60 days, send email 1 on day 55 and email 2 on day 60. Adjust based on actual repurchase data once you have enough orders.
Expected metrics: 35 to 45% open rate, 6 to 10% click rate, 4 to 8% conversion rate. This flow typically has the highest conversion rate of any automated flow because the customer genuinely needs to reorder.
7. VIP and Loyalty
Your top customers, the ones who buy frequently and spend the most, deserve special treatment. A VIP flow triggers when a customer reaches a certain spend threshold or order count, welcoming them into a loyalty tier and rewarding their continued business.
Structure (2 to 3 emails):
- Email 1 (trigger: VIP threshold reached):Congratulate them. Make them feel special. Offer an exclusive perk (early access to new products, a personal discount code, free expedited shipping). Subject line example: "You are officially a [Brand] VIP"
- Email 2 (7 days later):Exclusive preview or early access to a new product or collection. Subject line example: "VIP early access: see it before anyone else"
- Email 3 (ongoing, triggered by new collection launches): Give VIPs 24 to 48 hour early access to every new launch. This creates a habit and makes them feel valued.
Expected metrics: 50 to 60% open rate, 8 to 12% click rate. VIP emails should outperform every other flow because these customers already love your brand. If they do not, your VIP criteria may be too broad.
Getting Started This Week
You do not need to build all seven flows at once. Prioritise based on impact:
- Week 1: Set up your abandoned cart flow. This will have the most immediate revenue impact.
- Week 2: Build your welcome series. Every new subscriber should enter a structured onboarding experience.
- Week 3: Launch your post-purchase flow to start collecting reviews and driving cross-sells.
- Week 4: Add browse abandonment and win-back flows to capture the remaining opportunities.
- Month 2: Build replenishment (if applicable) and VIP flows to maximise lifetime value.
Most e-commerce email platforms (Klaviyo, Mailchimp, Drip, Omnisend) offer pre-built templates for these flows. Use them as a starting point, but customise the copy, timing, and design to match your brand. The templates get you 80% of the way there. The last 20%, the part that involves your specific products, tone, and customer behaviour, is what separates average email marketing from great email marketing.
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