Every few years, a new channel emerges and someone declares that email is dead. It never is. In fact, for businesses that use it well — especially e-commerce — email marketing consistently delivers one of the highest returns on investment of any channel available. And with modern automation platforms, the ceiling on what's possible has never been higher.
The reason email endures is simple: you own the audience.
Rented vs. Owned Audiences
When you build a following on social media, you're building on rented land. The platform controls who sees your content, how often, and under what conditions. Algorithm changes can cut your organic reach overnight. Account issues can eliminate access entirely.
Your email list belongs to you. No algorithm decides whether your subscribers receive your message. No platform update changes the rules mid-campaign. That ownership has compounding value — and when you layer automation on top of it, that value multiplies.
What Email Does That Other Channels Don't
Email marketing excels at three things that are critical for business growth:
- Customer retention — Regular, valuable communication keeps your brand top of mind long after the first purchase or engagement.
- Repeat revenue — For e-commerce businesses especially, well-timed email sequences drive a significant share of total revenue from customers who already trust the brand.
- Lifetime value — Customers who stay engaged via email buy more frequently and refer more often than those who don't.
What most businesses miss is that these three outcomes aren't just the result of sending more emails. They're the result of sending the right email to the right person at the right moment — and that's exactly what automated retargeting workflows are built to do.
Automated Retargeting: Turning Behavior Into Revenue
Retargeting emails are triggered by what a customer does (or doesn't do). Rather than blasting your entire list with the same message, you're responding to real signals: a product viewed, a cart abandoned, a purchase made, a long silence.
Platforms like Klaviyo and Mailchimp make this accessible for businesses of nearly any size. Here's how to think about building these workflows:
Abandoned Cart Sequences
This is the single highest-ROI automation most e-commerce businesses can implement. When a shopper adds items to their cart but doesn't complete checkout, a well-timed sequence can recover a significant portion of that lost revenue.
A basic three-email abandoned cart flow might look like this:
- Email 1 (1 hour after abandonment): A gentle reminder with a clear image of the cart items and a direct link back to checkout. No pressure, no discount — just a nudge.
- Email 2 (24 hours after abandonment): Add social proof. Include a review or rating for the specific product left behind. Reinforce confidence in the purchase.
- Email 3 (48–72 hours after abandonment): If the cart is still idle, this is where a time-limited incentive — free shipping, a small discount — can tip the decision without training customers to always wait for a deal.
In Klaviyo, this flow is built using their visual Flow builder with a "Started Checkout" trigger. In Mailchimp, the equivalent lives under Customer Journeys with an "Abandoned Cart" starting point.
Browse Abandonment
This workflow targets shoppers who viewed a product page but never added anything to their cart. The intent signal is weaker, so the messaging should be lighter — more curiosity-driven than urgency-driven.
A single email 24 hours after the browse event, highlighting the viewed product alongside related items, is often enough to bring them back. Klaviyo's "Viewed Product" trigger makes this straightforward. In Mailchimp, you can accomplish this via the Customer Journey builder using website activity triggers, available on paid plans.
Post-Purchase Sequences
The moment after a purchase is often the most underused window in e-commerce email marketing. A customer who just bought from you is at peak trust and engagement.
A post-purchase sequence might include:
- Order confirmation + what to expect (immediate, transactional)
- Product usage tips or onboarding content (3–5 days after delivery)
- Cross-sell or upsell recommendations (2–3 weeks post-purchase, based on what they bought)
- Review request (timed to arrive after the customer has had time to actually use the product)
Both Klaviyo and Mailchimp support product-specific cross-sell logic — Klaviyo's predictive analytics can even suggest the next likely purchase for individual customers based on purchase history.
Win-Back Campaigns
Customers who haven't purchased in 60, 90, or 180 days are at risk of churning permanently. A win-back sequence acknowledges the lapse and gives them a reason to return.
Effective win-back flows often include a sequence of two to three emails: a "we miss you" open, followed by a highlight of what's new or improved, and finally a one-time offer for customers who still haven't re-engaged. Anyone who doesn't open or click after that sequence should be suppressed to protect your sender reputation and list health.
Segmentation: The Engine Behind Relevance
Automation is only as effective as the segmentation driving it. Sending the right message requires knowing who you're talking to — and modern platforms give you more ways to slice your audience than most businesses ever use.
Geographic Segmentation
Regional differences matter for e-commerce. Seasonal product relevance, shipping timelines, local promotions, and even cultural nuances can affect both what you send and when. A swimwear brand promoting spring inventory should be messaging customers in the Southeast before they reach those in the Northeast. Both Klaviyo and Mailchimp support location-based segmentation using shipping address data or IP-derived location.
Purchase Behavior Segmentation
This is where the real personalization power lives:
- First-time buyers vs. repeat customers — First-timers need confidence-building; repeat customers respond better to loyalty recognition and VIP treatment.
- High-value customers — Segment by lifetime value to identify your top tier. These customers warrant exclusive access, early releases, or loyalty perks.
- Category-specific buyers — A customer who only ever buys skincare products shouldn't be receiving your apparel promotions. Segmenting by product category dramatically improves relevance and reduces unsubscribes.
- Purchase frequency — Customers who buy every month are different from customers who make one large annual purchase. Cadence and messaging should reflect that.
Engagement-Based Segmentation
How a subscriber interacts with your emails is itself a signal. Someone who opens every email is a different audience than someone who hasn't opened in three months. Segment by:
- Active engagers (opened or clicked in the last 30–60 days)
- Lapsed engagers (no opens in 90+ days)
- Never-engaged (subscribed but never opened)
Klaviyo's predictive analytics layer can extend this further, surfacing churn risk scores and expected next order dates — letting you intervene before a customer goes cold rather than after.
RFM Modeling
More advanced segmentation uses RFM — Recency, Frequency, and Monetary value — to score and segment your entire customer list. This framework identifies your best customers, your at-risk customers, and your lost customers in a single model. Klaviyo has built-in RFM-style customer tiers. In Mailchimp, you can approximate this using their Contact Rating system and custom tags.
Choosing the Right Platform
Both Klaviyo and Mailchimp are capable tools, but they're built for different contexts:
Klaviyo is purpose-built for e-commerce. Its native integrations with Shopify, WooCommerce, and BigCommerce pull in real-time behavioral and purchase data that powers highly specific segmentation and automation. If your business runs on transaction volume and product catalog depth, Klaviyo's analytics and predictive features are worth the investment.
Mailchimp offers a broader, more generalist toolset that works well for businesses combining e-commerce with service offerings, content marketing, or B2B outreach. The Customer Journey builder is capable and accessible, and its lower entry cost makes it a practical starting point for businesses building their automation infrastructure for the first time.
The right choice depends on your tech stack, your list size, and how deeply you want to automate. Either platform, used well, can generate significant returns.
Why Most Businesses Under Use Email
The businesses we work with often have a list — sometimes a significant one — that they're barely using. A welcome email, maybe a seasonal promotion, and then silence.
That silence is expensive. Every month a subscriber goes without hearing from you is a month they might forget you exist or find a competitor who stays in touch. And every abandoned cart that never receives a follow-up is recoverable revenue left on the table.
The good news is that the infrastructure to fix this is well within reach for most businesses. You don't need a large team or a massive budget. You need a thoughtful strategy, clean segmentation, and a few well-built automations running consistently in the background.
Getting Started
If you have a list and you're not using it consistently, that's the most accessible lever you have for near-term revenue growth. If you don't have a list yet, now is the time to start building one — and to build the automation infrastructure alongside it from the beginning.
At SE TN Consultants, we help businesses design and implement email strategies that go beyond newsletters — building segmented, automated systems that retain customers, recover lost revenue, and compound in value over time.
If you're ready to put your list to work, let's have a conversation.