Growing an email list is often seen as a sign of progress in e-commerce. More subscribers mean more opportunities to promote products, announce launches, and share special offers. However, a larger audience does not automatically translate into higher revenue.
As you can see, Subscribers increased by 100%, while revenue grew by only 10%. As a result, revenue per subscriber decreased by 45%.
This highlights an important question: is the business building a more valuable audience or simply a bigger one? Despite attracting more subscribers, the business generates less revenue per subscriber, suggesting audience growth isn't translating into meaningful engagement or conversions. This shows why e-commerce brands must focus on subscriber quality, engagement, and revenue efficiency, rather than just increasing list size.
1. Email Engagement Matters, but Purchases Matter More
A high email open rate may indicate interest, but it does not necessarily lead to sales. For e-commerce businesses, the real measure of email marketing success is how effectively engagement turns into purchases.
According to Omnisend's 2026 E-commerce Marketing Report, email engagement and conversion performance improved between 2024 and 2025.
While email open rates rose 15%, clicks fell 39%. One possible reason is Apple Mail Privacy Protection and Gmail's inbox categorization, which can count an email as opened even if the person did not actually read it. This can make open rates look higher than the real level of engagement. That’s why clicks are often a better sign of whether people were genuinely interested in the email. Click-to-conversion has become a stronger indicator of real engagement. Although overall clicks were lower, purchase conversions increased by 53%, showing that the people who did click had stronger buying intent and were more likely to make a purchase.
The key takeaway: Better-quality clicks can lead to more sales, even when the total number of clicks is lower.
2. Automated Emails Can Generate More Revenue Than Regular Campaigns
Automated emails are one of the biggest revenue opportunities in e-commerce email marketing. Regular campaigns still make up most of the email volume, accounting for around 94.7% of total sends, while automated flows represent only 5.3%.
Even with such a small share of sends, automated flows generate nearly 41% of total email revenue. This shows how much more valuable automated emails can be compared with standard promotional campaigns.
The reason is simple: automated emails are triggered by customer actions, so they often reach people at the right moment. This leads to better engagement and more sales. Automated flows have an average click rate of 5.58%, compared with just 1.69% for regular campaigns.
Many brands still rely heavily on promotional emails, which means they may be missing a major revenue opportunity.
The key takeaway is clear: better email performance comes from building strong automated flows, not simply sending more campaigns or growing a bigger email list.
3. Abandoned Carts Represent a Revenue Opportunity
Cart abandonment is one of the biggest missed sales opportunities for online stores. Around 69.99% of shopping carts are left unfinished, which means nearly 7 out of every 10 customers place products in their cart but leave before paying.
Fortunately, some of these lost purchases can still be recovered. One common method is to send abandoned cart emails. A three-email follow-up sequence can bring back around 12% to 22% of abandoned carts, depending on the business size and the products being sold.
Abandoned cart emails also perform well when it comes to customer engagement. On Klaviyo, these emails have an average 50.5% open rate and a 3.33% purchase rate.
Overall, cart abandonment represents a large amount of potential income for e-commerce businesses. Baymard Institute estimates that around $260 billion in sales could be recovered each year. By making the checkout process easier and using well-planned cart reminder emails, online stores can encourage more shoppers to return and complete their orders.
4. Personalisation Makes Emails More Relevant
Personalization is no longer just a useful marketing tactic. It has become an important way for e-commerce businesses to increase customer engagement and generate more sales. Klaviyo’s 2026 benchmark data shows that AI-powered product recommendations achieve an average email click rate of 3.75%, while also helping businesses increase revenue from each email recipient.
Behavior-based emails can make personalization even more effective. These emails are sent based on actions customers take, such as viewing a product, adding an item to their cart, or making a previous purchase. According to Forrester Research, behavior-triggered emails can convert at around 4 times the rate of regular broadcast campaigns.
Combining the right timing with relevant product recommendations helps businesses send emails that better match what customers are interested in. Instead of sending the same message to everyone, brands can use customer behavior and segmentation to deliver more useful and relevant content.
The main advantage does not come from sending more emails or having a larger contact list. Better results come from understanding customer behavior, creating meaningful segments, and sending personalized content through automated email flows.
5. Email Engagement Statistics: Which Emails Get Better Results?
Not all marketing emails perform the same way. The 2025 benchmarks show that welcome and abandoned cart emails get better engagement than regular promotional emails.
Welcome Emails Get More Attention
Welcome emails have a 45.2% open rate and a 3.8% click rate. New subscribers are interested in your brand, making this a good time to introduce products, offer a first-purchase discount, and build trust.
Abandoned Cart Emails Bring Shoppers Back
Abandoned cart emails achieve a 50.5% open rate and a 6.25% click rate. These emails remind customers about products they left in their carts. A timely reminder or customer review can encourage them to complete their purchase.
Promotional Emails Need Personalization
Regular promotional emails have a 30.7% open rate and a 1.69% click rate. Sending the same offers to everyone may reduce interest. Instead, share relevant products and offers based on customers' interests and shopping behavior.
6. Email Automation Benchmarks: Order Rates Across 12 E-commerce Industries
This infographic compares email order rates across 12 e-commerce industries, contrasting standard campaign order rates (dark blue dots) with automated flow order rates (red dots).
Key Findings & Visual Data
Automated Flows Deliver Higher Order Rates: Across all 12 industries shown, automated email flows consistently achieve higher order conversion rates than standard campaign broadcasts.
Highest Order Rate: Home & Garden achieves the highest flow order rate at 2.17%, rising from a 1.34% campaign order rate.
Strong Performers: Electronics (2.01%) and Hardware & Home Improvement (1.96%) also reach close to 2% order rates through automated flows.
Lowest Campaign Rate: Clothing & Accessories records a campaign order rate of 0.97%, though automated flows increase its rate to 1.62%.
Core Takeaway
The visual evidence demonstrates that behavior-triggered, automated email sequences - such as welcome series and cart recovery messaging—outperform general promotional broadcasts. Across every product category, sending timely messages based on user action generates a noticeable boost in customer conversions.
7. How to Turn Email Subscribers Into Revenue
Growing an email list isn't enough - you need to build an audience that actually buys. While mass email blasts make up most of what brands send, automated emails drive almost half of total email sales because they reach people at the exact right moment.
Key takeaways from the data:
Quality Over Quantity: Having more subscribers only helps if they stay engaged and buy.
Automations Win: Action-triggered emails - like welcome sequences and cart recovery reminders—generate much higher order rates than generic promo blasts across every industry.
Personalization Works: Tailoring recommendations based on how customers shop turns casual clicks into real revenue.
To boost your sales, stop focusing just on list size. Focus on guiding subscribers through a smooth journey from their first click to their final checkout.
Frequently Asked Questions
Does a bigger email list generate more sales?
Not necessarily. A larger list creates more opportunities to reach customers, but revenue also depends on audience quality, engagement, conversion rates, and repeat purchases.
Which email marketing metrics should e-commerce businesses track?
Revenue per email sent, revenue per subscriber, click rate, conversion rate, and customer lifetime value provide a more complete picture than subscriber count or open rate alone.
Why do automated email flows matter?
Flows respond to customer behaviour, allowing businesses to send relevant messages after a sign-up, product view, abandoned cart, or purchase.
Should businesses focus on email campaigns or automation?
Both serve different purposes. Campaigns support launches, promotions, and brand communication, while automated flows respond to individual customer journeys. Combining them helps businesses reach broader audiences and address specific customer actions.
