Email remains the highest-returning channel for most UK online stores — not social media, not ads. The reason is simple: you own the list. No algorithm decides who sees your message, and every subscriber has already raised their hand to hear from you. But most stores either email too little, email badly, or both.
These eleven tips are the practical fundamentals that separate stores whose email drives a third of revenue from stores treating it as an afterthought. They assume you are using a proper email platform (Klaviyo, Mailchimp, Omnisend, or similar) rather than sending from a personal inbox.
1. Build the list before you need it
The biggest email mistake is starting list-building the week you want to send a promotion. Add signup capture to your store from day one: a checkout opt-in, a modest discount or free-guide incentive in a popup or footer form, and clear permission wording. Under UK GDPR and the Privacy and Electronic Communications Regulations, you need proper consent for marketing emails — pre-ticked boxes do not count, and bought lists are both illegal for this purpose and useless in practice.
2. Send a welcome series, not a single email
A new subscriber is at peak interest in the minutes after signing up. A single "thanks for subscribing" email wastes that moment. Build a short welcome series — three to five emails over a week or two — that introduces your brand story, showcases bestsellers, explains what makes you different, and delivers the promised discount code. Welcome emails consistently get the highest open rates of any campaign type; use them.
3. Recover abandoned baskets automatically
Most baskets are abandoned — that is normal ecommerce physics. An automated abandoned-cart sequence (first email within an hour, a reminder a day later, a final nudge with a small incentive after two or three days) recovers a meaningful share of otherwise lost sales. Keep the tone helpful rather than desperate, show the actual items left behind, and make returning to checkout one click. This single automation often pays for the entire email platform.
4. Segment instead of blasting everyone
"20% off everything" sent to your whole list trains customers to wait for discounts and annoys people who just bought at full price. Segmentation — splitting your list by behaviour — lets you send relevant messages: VIP customers get early access, lapsed buyers get a win-back offer, browsers get social proof, first-time buyers get care guides. Even basic segmentation (purchased vs never purchased, engaged vs inactive) dramatically outperforms batch-and-blast.
5. Write subject lines for humans, not spam filters
Your subject line has one job: earn the open. Keep it under 50 characters so it survives mobile inboxes, be specific rather than clever ("Your basket is waiting — complete checkout in 2 minutes" beats "Don't miss out!!"), and avoid the shouty clichés (ALL CAPS, excessive exclamation marks, "FREE!!!") that trigger both spam filters and human scepticism. Test two variants on a portion of your list and send the winner to the rest — most platforms do this automatically.
6. Make every email readable on a phone
The majority of UK marketing emails are opened on mobile. If your email requires pinching and zooming, it gets deleted. Use a single-column layout, large tap-friendly buttons (not tiny text links), concise copy, and images that load fast. Send yourself a test to your own phone before every campaign — the five minutes it takes catches most problems.
7. Win back lapsed customers systematically
Customers who bought six months ago and went quiet are warmer prospects than any cold audience. A win-back flow — "we miss you", a reminder of what they bought, a modest incentive, and finally asking if they still want to hear from you — reactivates a solid percentage. Those who do not engage after the sequence should be suppressed from regular campaigns; emailing dead addresses hurts your deliverability for everyone else.
8. Use post-purchase emails to drive the second order
The cheapest sale is the second one. After delivery, follow up: a thank-you, care instructions or usage tips for the product, a request for a review (which feeds your social proof and your Google presence), and timed cross-sell suggestions — replenishment reminders for consumables, complementary products for durables. A customer who buys twice is far more likely to become a repeat buyer for life.
9. Respect the inbox: frequency and list hygiene
There is no universal "right" frequency, but there is a wrong one: erratic bursts of daily emails followed by months of silence. Pick a sustainable rhythm — for most stores, one to four campaigns a month plus automations — and stick to it. Regularly remove hard bounces and long-term non-openers. A smaller, engaged list outperforms a large, dead one on every metric that matters, including deliverability.
10. Personalise beyond the first name
"Hi {FirstName}" is not personalisation; it is mail merge, and customers know it. Real personalisation uses behaviour: product recommendations based on browsing and purchase history, replenishment timing based on typical usage, content matched to the categories someone actually shops. Most modern platforms do this out of the box — the work is in setting it up properly, not in the technology.
11. Measure revenue, not just opens
Open rates are increasingly unreliable (Apple's privacy changes inflated them artificially), so judge email on what matters: revenue per recipient, click-through rate, conversion rate, and unsubscribe rate. Track which automations and campaigns actually drive orders, double down on what works, and kill what does not. Email is wonderfully measurable — use that advantage.
Bringing it together
You do not need all eleven running tomorrow. The sequence that works for most stores: capture emails properly, set up the welcome series and abandoned-cart flow first (the two highest-return automations), then add segmentation and post-purchase flows, then layer in regular campaigns. Each step compounds the last.
Email also works best as part of a joined-up growth strategy rather than a lone tactic. Understanding how to analyse customer behaviour will sharpen your segmentation enormously, and if your store needs broader growth support — from SEO to paid media — our ecommerce growth service covers the full picture.
FAQs
How often should an ecommerce store send marketing emails?
For most UK stores, one to four campaigns per month plus automated flows (welcome, abandoned cart, post-purchase) is a sustainable starting point. Watch unsubscribe rates and engagement: rising unsubscribes mean you are emailing too much or too irrelevantly. Consistency matters more than volume.
What is the best email platform for a small UK online store?
Klaviyo is the ecommerce specialist and integrates deeply with Shopify and WooCommerce; Mailchimp and Omnisend are solid alternatives at lower cost. Choose based on your store platform, list size, and which automations you need — all of them handle the fundamentals well.
Do I need consent to send marketing emails in the UK?
Yes. Under UK GDPR and PECR you generally need prior consent (a clear opt-in, not a pre-ticked box) to send marketing emails to individuals, with a narrow "soft opt-in" exception for existing customers about similar products. Always include a working unsubscribe link. When in doubt, get proper consent — it also produces better lists.
What is a good open rate for ecommerce emails?
Benchmarks vary, but UK ecommerce campaigns often see 30–45% opens (inflated by privacy changes) and 1–3% click-through rates. Automated flows like welcome and abandoned-cart emails perform far better than bulk campaigns. Judge yourself on revenue per recipient and trends over time rather than any single benchmark.
Should I offer a discount for email signups?
It works for list growth but trains discount expectations. Alternatives — free delivery on first order, a useful buying guide, early access to new products — build the list without eroding margins. If you do use a discount, keep it modest and consider excluding it from sale periods.
Contact us if you want help turning email into a proper revenue channel for your store — from automation setup to full growth strategy.
