Email Marketing Best Practices for Ecommerce

Email marketing generates an average ROI of £42 for every £1 spent — the highest of any digital channel. Yet most ecommerce brands are leaving the majority of that value on the table by sending batch-and-blast campaigns to their entire list. Here's how the top 10% of brands approach email differently.

Segmentation: The Foundation of Everything

Sending the same email to your entire list is the fastest way to train your subscribers to ignore you. Meaningful segmentation is what separates brands with 15% open rates from those with 40%+.

• RFM segmentation: Recency, Frequency, Monetary — the gold standard for ecommerce email
• Engagement-based segments: active (opened in 90 days), at-risk (90-180 days), lapsed (180+ days)
• Category-based segments: only email customers about categories they've actually bought from
• VIP segment: your top 10% of customers by revenue — treat them differently
• Win-back segment: customers who haven't purchased in 6+ months but were previously active

The 5 Flows Every Ecommerce Store Needs

Automated flows should be generating 30-40% of your total email revenue. If they're not, your flows need work. Here are the five non-negotiables:

1. 1Welcome series (3-5 emails): Introduce your brand, tell your story, deliver your welcome offer, and make the first sale
2. 2Abandoned cart (3 emails): Reminder at 1 hour, value prop at 24 hours, discount offer at 72 hours
3. 3Browse abandonment (2 emails): Gentle nudge at 24 hours, social proof at 72 hours
4. 4Post-purchase (3 emails): Order confirmation, cross-sell at 7 days, review request at 14-21 days
5. 5Win-back (3 emails): 'We miss you' at 90 days, your best offer at 120 days, final attempt at 150 days

Campaign Strategy: What to Send and When

Beyond flows, your campaign calendar should be a deliberate mix of promotional, educational, and relationship-building content. A good rule of thumb: no more than 40% of your sends should be pure promotional.

• Send 2-4 campaigns per week to your engaged segment, 1-2 per week to your full list
• Tuesday and Thursday mornings (8-10am in your customer's timezone) consistently outperform other times
• Plain-text emails often outperform designed HTML emails for re-engagement campaigns
• A/B test subject lines on every campaign — test with 20%, send winner to 80%
• Clean your list quarterly: suppress anyone who hasn't opened in 180 days before they hurt your deliverability

“The brands winning at email aren't sending more — they're sending smarter. Relevance beats volume every time.”