E-commerce · Performance marketing
Email & CRM: The Most Profitable Channel Everyone Neglects
Building email marketing in e-commerce pays off: no auction costs, your own audience. The four key automations and the right success metric.
By Boaz Lichtenstein
Many people see email marketing as the dull, old tool next to the shiny ads platforms. And yet it’s the most profitable channel in most stores – it’s just rarely run with the same care as performance campaigns.
Key takeaways
- Email has no auction costs like Google or Meta – sending costs almost nothing, regardless of competitive pressure in the ad market.
- Four automations (welcome, cart abandonment, post-purchase, winback) deliver the lion’s share of email revenue in most stores.
- The discount reflex in list-building attracts discount-driven rather than brand-loyal addresses and lowers margin from the start.
- Revenue per recipient is the reliable metric – open rates have barely been meaningful since Apple Mail Privacy Protection.
- Segmenting by purchase behaviour extracts noticeably more revenue from the same list than a single blanket send to everyone.
Why email has the best margin
On Google and Meta, you pay for every impression and click the price the auction market currently demands – and that price rises structurally the more competitors bid for the same audience. With email, that auction pressure disappears entirely.
Once an address is on your list, sending costs almost nothing, regardless of how many competitors are currently fighting for attention. Email is therefore a genuine owned audience – one that belongs to you rather than being rented. That’s the same structural advantage that makes building your own brand so valuable (see our article on the path from store to brand), and it’s closely tied to building your own first-party data: the more you know directly from your customers, the more precisely you can tailor email content.
Illustrative example: a list of 10,000 active addresses with revenue per recipient of two euros a month brings in €20,000 of monthly revenue – without a single cent of that send going to an ad platform. If better segmentation and cleaner automations raise that value to three euros per recipient, that’s €30,000, at practically identical fixed costs for the email tool. This leverage – more revenue without proportionally more cost – is structurally unreachable on Google and Meta, because there every additional euro of revenue also needs additional ad budget.
The four automations that deliver 80%
Four flows deliver the lion’s share of email revenue in most stores, because they run automated in the background and trigger at exactly the right moment.
| Automation | Trigger | Goal |
|---|---|---|
| Welcome series | New sign-up | Introduce brand and range, capture peak attention |
| Cart abandonment | Purchase not completed | Recover lost purchase intent |
| Post-purchase | After the order | Increase satisfaction, prepare the second purchase |
| Winback | Extended purchase gap | Stop churn, reactivate |
The welcome series uses the highest attention right after sign-up. Cart abandonment recovers purchase intent that would otherwise be lost entirely. Post-purchase emails prepare the second purchase instead of going quiet after the order – this is also where a review request can be cleanly built in, placed within the right usage window. And the winback automation reactivates customers who haven’t bought in a while, before they churn for good.
Building a list without the discount reflex
The reflex to buy every new sign-up with a ten percent discount is understandable but expensive: it attracts discount-driven addresses rather than brand-loyal customers and lowers average margin from day one.
More sustainable are genuine value incentives – exclusive content, early access to new products, community benefits. Technically, a clean double opt-in that confirms sign-up belongs here, as well as GDPR-compliant consent and documentation of that consent. Doing this cleanly builds a list that holds up both legally and qualitatively. (This is not legal advice.)
Anyone who still doesn’t want to skip an incentive entirely should keep it small and time-limited – free shipping on the first order, say, instead of a blanket discount on order value. The difference seems trivial, but it isn’t: a discount on order value lowers every single first order, whereas a shipping perk costs a fixed amount just once and doesn’t distort margin proportionally as the basket grows.
Segmentation: getting more out of the same list
Segmentation means sending different parts of the list different content, instead of serving everyone the same email – the effect is noticeably higher relevance and, with it, higher revenue per send.
The simplest and most effective split: first-time buyers, active repeat customers, and inactive customers. Each segment needs different content – first-time buyers benefit from orientation across the range, repeat customers from new arrivals and cross-selling, inactive customers from a clear reason to come back. Finer segmentation by category, purchase frequency or basket value is worth it once this basic structure runs reliably.
From experience: the biggest segmentation mistake isn’t splitting too coarsely, but too finely from the start. Anyone who breaks the list into twenty micro-segments before there are even enough recipients per segment for reliable results loses track and builds content for each segment that nobody ever evaluates. Three to five segments with clearly different behaviour beat twenty segments nobody has the capacity to maintain.
The most common email marketing mistakes
Most weak email programmes don’t fail because of bad copy, but because of structural gaps in the setup.
- Only sending campaigns, never building automations – fix: set up the four core flows first, they run continuously.
- Rewarding every sign-up with a discount immediately – fix: test value incentives instead of price incentives.
- Treating all recipients the same – fix: start with a simple three-segment logic.
- Measuring success by open rate instead of revenue – fix: establish revenue per recipient as the leading metric.
- Never cleaning the list – fix: regularly remove permanently inactive addresses, it protects deliverability and reputation.
Measurement: revenue per recipient instead of open rate
Open rates have been technically unreliable since Apple Mail Privacy Protection, and they never said much about business success anyway. The metric that counts is revenue per recipient.
It’s comparable across campaigns and automations and can be linked directly to contribution margin. Anyone who measures email against this figure instead of vanity metrics quickly sees which segments and which content actually drive revenue – and can build the channel out deliberately, instead of allocating resources based on superficial numbers.
A practical side effect: once revenue per recipient is established as a metric, you can also fairly compare content that seems to have nothing in common at first glance – a discount campaign against a pure content newsletter, a new product against a winback email. All of them deliver the same unit, and that’s exactly what makes prioritising the email calendar discussable in the first place.
The bottom line
Email remains the channel with the best margin, because it does without auction pressure and belongs to you instead of being rented. Anyone who sets up the four core automations cleanly, builds their list without the discount reflex, and steers consistently by revenue per recipient builds a channel that gets more valuable every month instead of more expensive. The next sensible step is rarely a new campaign idea – it’s usually an honest stocktake: are the four automations even running yet?