The 5 Biggest Email Automation Mistakes E-Commerce Brands Make
AND HOW TO FIX THEM
Email automation sounds like magic: you set it up once, and money starts rolling in.
But if it’s built wrong—or worse, left to rot—it can quietly kill your conversions, frustrate your best customers, and cost you more than you realize.
At ECD Digital Strategy, we’ve audited, rebuilt, and scaled hundreds of flows inside Klaviyo. Here’s what we’ve learned:
The biggest mistakes aren’t flashy. They’re quiet. And they drain revenue every day you leave them untouched.
Let’s break down the five most common mistakes e-commerce brands make with email automation—and how you can fix them the right way.
What is Email Automation?
Email automation means sending the right message at the right time, triggered by real customer actions.
Someone signs up. Abandons their cart. Leaves a review. And your system automatically sends the right message at the right time.
Built inside platforms like Klaviyo, flows include:
A trigger (the action that starts the flow)
Filters (rules that control who qualifies)
Emails (the messages, delays, and logic)
Done right, email automation creates a system that nurtures, sells, and re-engages—around the clock.
How Email Automation Drives Revenue for E-Commerce Brands
The highest-earning flows we see across brands are simple but powerful:
Welcome Flow — Turns new subscribers into first-time buyers
Browse, Cart, Checkout Abandonments — Recover lost sales fast
Post-Purchase Flows — Create repeat buyers, reviews, and loyalty
Winback Flows — Reignite relationships with lapsed customers
When built right, flows can handle 60–80% of your email revenue. When built wrong, they become silent profit leaks.
Why Drip Email Automation Matters
Smart drip campaigns do three things:
Save your team time
Drive sales automatically
Create a personal experience that feels human, not automated
And with the right setup, flows adapt based on behavior: buying habits, cart activity, engagement levels.
It’s a full-funnel revenue system, not just a set-it-and-forget-it tool.
How to Spot and Fix the 5 Biggest Automation Mistakes
Mistake 1: Not Using the Right Filters or Logic
Most DIY flows look great on the surface—but underneath, they’re wide open. Wrong filters. No segmentation. Everyone gets everything.
Example: sending a discount to someone who just paid full price. Or spamming a VIP customer with a generic winback offer.
We see this mistake constantly, and it steadily eats away at revenue and weakens trust.
How To Fix It:
Map the customer journey before you build the flow.
Use real test profiles to QA every step.
Add If/Else splits based on behavior (purchase amount, product type, etc.). a personal experience that feels human, not automated
When in doubt: test it like a customer, not like a marketer.
Mistake 2: Overlapping Flows That Bombard People with Emails
Klaviyo doesn’t warn you when flows overlap. That’s why brands accidentally send a Welcome email, a Cart Abandonment, and a Post-Purchase email—all in the same afternoon.
Result? Annoyed subscribers. Higher unsubscribes. Lower lifetime value.
How To Fix It:
Think in systems, not silos: Welcome → Abandonment → Post-Purchase → Winback.
Add entry/exit conditions across flows to prevent collisions.
Delay Browse Abandonment or Winback sends if a recent purchase or engagement just happened.
Map your flows visually before launch. Paper, whiteboard, anything—it saves you real money later.
Mistake 3: Ignoring Deliverability Issues Inside Your Flows
Most people check open rates. Some check click rates.
Very few check spam complaints, bounce rates, and unsubscribes inside their automation flows.
If a flow is quietly racking up spam flags, your inbox placement tanks across your entire list—and you might not even know it.
How To Fix It:
Review flow-specific deliverability metrics monthly, not just revenue.
Suppress disengaged subscribers aggressively.
Prioritize engaged profiles in your Winback and Sunset flows.
Remember: inbox placement beats list size every single time.
Mistake 4: Skipping Post-Purchase Flows Because “They Just Bought”
One of the biggest myths in ecommerce:
“We can stop emailing once they buy.”
Wrong. Post-purchase flows are where the real money is. Happy buyers are primed for upsells, cross-sells, reviews, and referrals.
At ECD, we build post-purchase systems that often outperform new acquisition flows, and you can too.
How To Fix It:
Thank You Email (immediate) — Set clear expectations.
Product Tips Email (2–3 days) — Teach them how to win with your product.
Review Request (7–10 days) — Harvest testimonials and feedback.
Cross-Sell / Refill Offer (2–4 weeks) — Nudge them to come back.
First-time buyers and repeat buyers need different journeys—build for both.
Mistake 5: “Set It and Forget It” Syndrome
Flows are living systems, not static assets.
The market shifts. Products change. Audience behavior evolves. A Welcome Flow you wrote two years ago probably isn’t converting the same today.
Yet most brands never review or update their automation once it’s live. It’s like trying to win a race in a car you haven’t tuned up in years.
How To Fix It:
Schedule quarterly flow audits—non-negotiable.
Review key KPIs: revenue per recipient, click-to-open rate, unsubscribe rate.
Test subject lines, CTA copy, send delays, and segmentation tweaks.
Prune underperformers. Expand what’s working.
Fixing your automations isn’t just about avoiding mistakes—it’s about building a system that grows with your customers, adapts to their behavior, and drives measurable revenue over time.
If you’re ready to turn your flows into a true revenue engine, we can help.
Want Help Building Yours?
We’ve built, tested, and scaled hundreds of Klaviyo flows for brands serious about growth.
When you work with us, you don’t just get setups—you get systems:
Built for revenue first
Structured for customer experience
Optimized continuously for higher ROI
Most clients see email automation drive 25–40% of their total revenue once it’s fully optimized.
Before you send another email, see how much revenue you’re missing.
Written by: Facundo Zocola
Senior Email Marketing Manager by day, and travel enthusiast always, Facundo brings an explorer’s curiosity and a tactician’s brain to every part of the customer journey. Equal parts strategist and all-around nice guy, he believes great email marketing isn’t just clever—it’s clear, intentional, and always respectful of your time. Whether he's in your inbox, scoring a goal, or enjoying a pint of ice cream, the aim is always the same: making every win meaningful.