Email marketing automation for e-commerce: flows that sell while you sleep

Every day Shopify webshops miss revenue they could already have earned. Not through lack of visitors or products, but because there is no follow-up. No reminder to the customer who abandoned their cart. No welcome email for the new subscriber. No follow-up after last week’s purchase.

Email marketing automation solves that. With the right automated flows, your Shopify webshop earns revenue at moments when you are not there yourself. Not via bulk sends to your entire list, but via targeted messages at precisely the right moment for the right person. In this article we explain which flows every e-commerce entrepreneur absolutely needs, how to set them up in Klaviyo and why they deliver the highest return of any marketing channel.

What is email marketing automation and how does it work for e-commerce?

Email marketing automation is the sending of emails that are automatically triggered by customer behaviour, without manual work or planned newsletters. A customer performs an action on your webshop, and the system responds directly with the right message at the right moment.

For e-commerce, the most relevant triggers are:

• A newsletter subscription via a popup or checkout
• Adding a product to the cart without purchasing
• Viewing a product page without taking action
• Placing or receiving an order
• Extended inactivity from a previously active customer

The system that converts those triggers into emails is called a flow or sequence. For Shopify webshops, Klaviyo is the standard. The integration synchronises in real-time: purchases, product page visits, order values and customer profiles are automatically available as segmentation and personalisation data. That data is the raw material for every automated message.

Why do automated flows perform drastically better than regular campaigns?

Flows perform so much better than campaigns because they respond to behaviour, not a calendar. Klaviyo’s 2026 Benchmark Report shows that flows generate 41% of all email revenue with only 5.3% of sending volume. The average revenue per recipient (RPR) is 18 times higher than with standard campaigns.

The difference lies in relevance and timing. A campaign reaches everyone on the same day with the same message. A flow reaches a specific customer at the moment they have just viewed a product, abandoned a cart or placed an order. The context of the message connects to what the customer has just done, and that translates directly into higher conversions.

“Many companies approached their customers in a purely transactional way. They did not realise the value of both the moment before and after the purchase, that relationship.”

— Andrew Bialecki, co-CEO at Klaviyo

Compare it to a physical shop: a campaign is a mass mailing that everyone receives at the same time. An automated flow is a staff member who knows exactly when a customer needs attention, and responds at that moment, even in the middle of the night.

Which flows are mandatory for every Shopify webshop?

Five flows are the foundation. Without these five you are demonstrably leaving revenue on the table. Every other flow you add afterwards based on your own data and customer behaviour.

What ClickForest sees in practice with Belgian e-commerce clients: most webshops that come in for a website audit have at most one flow active, and it is often poorly configured. No segmentation, no A/B test, no timing optimisation. The benchmarks below are achievable, but only if the flows are correctly set up.

How do you build a welcome flow that converts?

The welcome flow delivers an average 8-12% conversion to first purchase and an open rate of 45-50%, the highest of all automated flow types. That makes it the most underutilised opportunity at Belgian e-commerce webshops: new subscribers are at this moment most receptive to your brand, and that attention only lasts a few days.

Build the welcome flow in three to four emails:

• Email 1 (directly after subscription): Thank you and brand introduction. No hard sell. Tell who you are and why that is relevant for the customer. Show your values, your story and what distinguishes you.
• Email 2 (day 2-3): Most popular products or editorial overview. Optionally a discount code or free shipping as a trigger for the first purchase.
• Email 3 (day 5-7): Social proof. Reviews, customer stories or media coverage. Give the new subscriber a concrete reason to trust you.
• Email 4 (day 10-14): Final push. Urgency without manipulation: discount code expires tomorrow, or limited stock of a recommended product.

“Our automated welcome series allows us to share our brand story with everyone who subscribes, which helps us convey the essence of our brand. Email automation makes it possible for a small team like ours to show customers that we value a genuine connection.”

— James Le Compte, CEO at To’ak Chocolate

What ClickForest sees in practice: most webshops start with one welcome email and that is already an enormous step. One relevant welcome email does three to five times more than no flow. You add complexity afterwards layer by layer based on what your data tells you.

How do you recover lost revenue with an abandoned cart flow?

An abandoned cart flow recovers an average of 3-5% of abandoned carts, with an RPR of approximately $3.65 per recipient (USD, Klaviyo benchmark). For webshops with order values above $200, that RPR rises to $14 or more. Because an average of 70% of all carts are abandoned without a purchase, this is for most Shopify webshops the fastest return on automation investment.

Use a sequence of three emails:

• Email 1 (1 hour after abandonment): Friendly reminder. Show the abandoned products with image and price. No discount yet. Many buyers purchase again without additional incentive.
• Email 2 (24 hours later): Lower the barrier. Add reviews or product benefits. Emphasise your return policy or guarantee if price is the obstacle.
• Email 3 (48-72 hours later): Optional discount or free shipping. Urgency: “This product is popular and may sell out.” Klaviyo automatically stops the sequence if the customer purchases in the meantime.

Also connect your abandoned cart flow to your CRO strategy: if many visitors abandon the cart at a specific point in checkout, that is a signal to improve the checkout itself, not just to optimise the follow-up.

What does a post-purchase flow do for customer retention and repeat purchases?

A well-configured post-purchase flow increases repeat purchases by 10-15% by actively guiding customers in the 45 days after their first order. It is at the same time the cheapest retention tool: you send to people who have already purchased, at the moment their engagement is highest.

Customers are most receptive to your brand directly after a purchase. Those who utilise that period build customer loyalty. Those who ignore that period leave a repeat purchase to chance.

Build the flow in four steps:

• Email 1 (directly after purchase): Order confirmation with expectation management. No upsell. Confirm that the choice was a good one.
• Email 2 (day 3-5): Product inspiration or usage tips. How do you get the most out of the product? This increases satisfaction and reduces returns.
• Email 3 (day 10-14): Review request. Good reviews are raw material for your welcome flow, your product page conversion and your advertising.
• Email 4 (day 30-45): Repeat purchase trigger. Related products or additions based on the first purchase via Klaviyo’s product recommendations.

Webshops that combine a strong post-purchase flow with good AI personalisation, see a higher customer lifetime value and lower acquisition costs over time. The customer you already have is cheaper than a new customer via Google Ads or Meta.

How do you reactivate dormant customers with a win-back flow?

A win-back flow recovers an average of 5-8% of dormant customers, at a fraction of the acquisition cost of a new visitor via paid advertising. At the same time it protects your sender reputation: inactive contacts that you never try to reactivate drag your deliverability down.

Focus the flow on customers who have not made a purchase or opened an email in 60 to 90 days.

Build the flow in three emails:

• Email 1: “We miss you.” No discount yet. Remind the customer of what they previously purchased or viewed. Personal and warm in tone.
• Email 2 (7 days later): Incentive. A temporary discount or free shipping as an activation trigger. Connect to new offer or seasonal relevance.
• Email 3 (14 days later): Last chance. After that: structurally remove inactive profiles from your active list. A smaller, engaged list performs better than a large, dormant one.

Want to know which flows your webshop is missing and what that concretely costs in revenue? Our marketing automation service helps you implement and measure the right flows, connected to your Shopify data.

How do you measure the real return on email automation?

Do not focus on open rates but on revenue per recipient (RPR) and attributed revenue per flow. Open rates have become unreliable due to Apple’s Mail Privacy Protection (MPP): they are recorded when tracking pixels load automatically, even if nobody actually opened the email. RPR and attributed revenue are the only metrics that tell you whether your automation is actually generating revenue.

“Owned revenue is the only revenue metric we look at. We celebrate owned revenue milestones and trust that when our customers are successful, we are too.”

— Andrew Bialecki, co-CEO at Klaviyo

The metrics that really matter:

• RPR (revenue per recipient): Comparable per flow type and over time
• Attributed revenue per flow: Total revenue that Klaviyo attributes to a specific flow
• Conversion rate per flow: Percentage of recipients who proceed to purchase
• List growth rate: Net growth of your active email list per month
• Unsubscribe rate: Signal of irrelevance or too high sending frequency

Connect your email performance to GA4 for cross-channel insight. Klaviyo’s own attribution model gives a good indication of email-specific revenue, but compare it with your GA4 data to avoid double attribution.

Klaviyo, Omnisend or Shopify Email: which platform do you choose?

For Shopify webshops that are growing seriously, Klaviyo is the standard choice. The integration with Shopify is the deepest on the market: customer data, order history, product page visits and real-time browsing behaviour are automatically synchronised and form the segmentation basis for all flows. No other platform gives you that combination of data quality and automation depth for e-commerce.

Omnisend and Shopify Email exist, but for those who want to seriously optimise they are too limited.

“Data is always messy, even with the best intentions and the best teams. But we strive too much for perfection, especially when it comes to personalisation. I would say that progress always beats perfection. Use the data you have, launch the campaign and start testing.”

— Leah Miranda, Manager Lifecycle Marketing at Zapier

Omnisend is a good alternative for smaller budgets, with solid flows and good multichannel options (email + SMS + push). Shopify Email is suitable for starting webshops with a simple profile, but lacks the segmentation depth and A/B testing capabilities you need for serious optimisation.

The choice depends on three factors: the number of active profiles in your list, the complexity of your segmentation strategy and whether you want to integrate SMS marketing. Unsure? Start with Klaviyo’s free plan (up to 250 profiles) and scale afterwards. What ClickForest sees: those who switch from Mailchimp or Shopify Email to Klaviyo generally see an immediate increase in flow attribution, not because the flows are better but because the segmentation and timing finally work correctly.

Where do you start if you have no email automation running yet?

Start with the abandoned cart flow and the welcome flow. Together these two flows cover the largest part of automation revenue for virtually every Shopify webshop, are technically the fastest to set up and do not require a large email list to show immediate results.

Email marketing automation for e-commerce is not an add-on on top of your performance marketing. It is the foundation of your customer relationship. Advertising attracts visitors. Flows convert those visitors into customers and keep them. Without automation you pay every time again for attention you had already earned before.

The five mandatory flows are an actionable priority list: welcome flow, abandoned cart, browse abandonment, post-purchase and win-back. Start with one flow if you are at zero now. Then add layer by layer based on what your data tells you. Perfection is later, presence is now.

Are you already active with e-commerce in Belgium but the right flows are still missing? Or are flows already running but you are not sure whether they are correctly configured? Get in touch or book a video call for a direct assessment of your current email marketing automation setup.