Build an Ecommerce Email Marketing Programme for Revenue

# Build an Ecommerce Email Marketing Programme for Revenue **Ecommerce Growth** — Most ecommerce brands treat email as an afterthought — a channel they use to blast promotions at their entire list and wonder why revenue flatlines. The reality is that a properly structured email programme is consistently the highest-ROI channel in your marketing mix, and for the brands we work with, it regularly drives £15,000 to £30,000 per campaign. This guide shows you exactly how to build that programme: the infrastructure, the flows, the segmentation logic, and the platform setup that makes every send count. — > 📊 **Full-funnel framework**  |  🇬🇧 **UK revenue benchmarks**  |  ⏱ **12 min read**  |  🏆 **15 years agency experience** — > ### Quick Answer > A high-performing ecommerce email programme is built on three foundations: **a clean, segmented list**, **automated lifecycle flows** triggered by behaviour, and **a consistent campaign calendar** tied to your trading plan. Brands using Klaviyo with a properly integrated Magento or Shopify store typically generate 25–35% of total revenue from email alone. You don’t need a massive list — you need the right message reaching the right segment at the right moment. Start with your abandoned cart, welcome, and post-purchase flows, then layer campaigns on top. — ## Table of Contents 1. [Why Most Ecommerce Email Programmes Underperform](#1-why-most-ecommerce-email-programmes-underperform) 2. [What Your Email Programme Should Actually Generate](#2-what-your-email-programme-should-actually-generate) 3. [Platform Selection: Klaviyo, Dotdigital, and When Each Wins](#3-platform-selection-klaviyo-dotdigital-and-when-each-wins) 4. [Klaviyo and Magento Integration: Getting the Data Foundation Right](#4-klaviyo-and-magento-integration-getting-the-data-foundation-right) 5. [List Health, Segmentation, and Deliverability](#5-list-health-segmentation-and-deliverability) 6. [The Core Lifecycle Flows Every Ecommerce Brand Needs](#6-the-core-lifecycle-flows-every-ecommerce-brand-needs) 7. [Campaign Strategy: From Ad Hoc Sends to a Revenue Calendar](#7-campaign-strategy-from-ad-hoc-sends-to-a-revenue-calendar) 8. [Ecommerce Email Strategy for B2B Brands](#8-ecommerce-email-strategy-for-b2b-brands) 9. [Budget, Resource, and Effort: What to Expect at Each Stage](#9-budget-resource-and-effort-what-to-expect-at-each-stage) 10. [Measuring What Matters: KPIs That Drive Decisions](#10-measuring-what-matters-kpis-that-drive-decisions) 11. [Your 90-Day Plan to Build the Programme](#11-your-90-day-plan-to-build-the-programme) 12. [Key Takeaways](#12-key-takeaways) 13. [FAQ](#13-faq) — ## 1. Why Most Ecommerce Email Programmes Underperform Email is the oldest digital marketing channel. It’s also the one most brands manage worst. After 15 years of auditing email programmes for UK ecommerce businesses, we see the same failure modes repeating. ### They Send to Everyone, Every Time Blasting your entire list with every campaign is the fastest route to declining deliverability, rising unsubscribe rates, and a database that stops opening your emails. A subscriber who bought once two years ago and hasn’t engaged since is not the same audience as someone who browsed three products last week. Treating them identically destroys performance for both segments. ### They Have Flows, But Not the Right Ones Most brands have an abandoned cart email. Some have a welcome sequence. Very few have a complete **lifecycle email** architecture that covers every meaningful customer moment — browse abandonment, post-purchase upsell, win-back, VIP tiering, replenishment reminders. Each missing flow is revenue left in the channel. ### Their Platform Isn’t Integrated Properly You cannot segment on data you don’t have. If your **Klaviyo** account isn’t receiving real-time order, browse, and customer data from your Magento or Shopify store, you’re running on assumptions. We regularly audit accounts where the integration is technically connected but sending incomplete or delayed data — undermining every flow and segment in the programme. — ## 2. What Your Email Programme Should Actually Generate The question we get most from brand owners is: “How much should ecommerce email generate?” The honest answer is: more than you’re currently making from it. ### Revenue Benchmarks That Matter Industry benchmarks say email should drive 20–30% of ecommerce revenue. For our clients running mature programmes on **Klaviyo ecommerce** setups with full lifecycle flows and disciplined campaign calendars, we consistently see 30–40%. On peak campaign sends — Black Friday, seasonal clearance, product launches — we generate £15,000 to £30,000 per campaign for mid-market UK brands with lists in the 30,000–150,000 range. The difference between a programme generating 15% of revenue and one generating 35% is almost never list size. It’s structure, segmentation, and consistency. ### The Revenue Split to Target A healthy email programme splits revenue roughly 40/60 between **automated flows** and **campaign sends**. Flows run in the background 24/7 without manual effort. Campaigns require planning and execution. Brands that rely entirely on campaigns are on a treadmill. Brands that invest in flows build compounding, passive revenue. ### What Brands Our Clients Compete With Are Doing The brands dominating email revenue in UK ecommerce treat the channel like a product, not a task. They have a dedicated owner (or an agency partner), a proper content and commercial calendar, and they review performance weekly — not monthly. They test subject lines, send times, and offer mechanics as standard practice. That’s not complicated. It’s just deliberate. — ## 3. Platform Selection: Klaviyo, Dotdigital, and When Each Wins **Platform selection** shapes everything downstream. The wrong choice creates technical debt that costs you far more to unpick than the licence saving was worth. ### Why Klaviyo Wins for Most Ecommerce Brands Klaviyo is purpose-built for ecommerce. Its data model — built around profiles, events, and properties — maps directly onto how an online store generates data. Every order, browse, cart event, and product interaction becomes a trigger or a segmentation dimension. The flow builder is visual and logic-rich. The predictive analytics (predicted CLV, churn probability, next order date) are genuinely useful and not just vanity features. For brands on Shopify, the integration is native. For Magento, a well-configured connector delivers the same depth. ### When Dotdigital or an Alternative Makes Sense Dotdigital wins on two dimensions: B2B ecommerce and enterprise brands that need tighter CRM integration with platforms like Salesforce or Microsoft Dynamics. If your sales process involves account managers, quote workflows, or complex customer hierarchies, Dotdigital’s account management features give you more structural flexibility. For pure DTC ecommerce, Klaviyo remains our default recommendation. ### What to Watch Out For in Any Platform Migration Platform migrations lose data. The profile history, event logs, and suppression lists that live in your old ESP represent years of behavioural data and compliance records. Before migrating, audit what you’re moving, map your data schema carefully, and stress-test your flows in the new environment before going live. We’ve seen brands migrate to Klaviyo and then spend six months rebuilding performance because they moved their contacts but lost their data context. — ## 4. Klaviyo and Magento Integration: Getting the Data Foundation Right **Klaviyo and Magento integration** is the most technically demanding part of the setup, and the most consequential. Get it right and every other part of the programme gets easier. Get it wrong and you’re optimising on bad data. ### What Data the Integration Must Pass The integration needs to pass, at minimum: customer profile data (email, name, location, marketing consent), order data (order value, products, order status, repeat purchase history), browse data (product views, category views), and cart data (cart contents, cart value, abandonment events). Beyond the minimum, you want product attributes (margin, category, stock status) and customer-level attributes (account age, total spend, segment tags) flowing through as custom properties. ### Consent and GDPR Compliance UK ecommerce brands must handle marketing consent correctly at the integration layer, not just at the form layer. Your Magento integration should pass consent status as a profile property and your Klaviyo suppression logic must respect it. Don’t rely on the platform defaults — configure your consent handling explicitly and audit it quarterly. The ICO takes ecommerce email compliance seriously, and “the integration set it up that way” is not a defence. ### Real-Time vs Batch Data Syncing Most off-the-shelf Magento-Klaviyo connectors default to batch syncing — pushing data every 15 to 60 minutes. For most flows, that’s fine. For abandoned cart, it’s not. A cart abandonment email that arrives two hours after someone left your site is far less effective than one arriving 45 minutes later. Ensure your integration handles cart events in real-time or near-real-time. This often requires a custom event push rather than relying on the standard connector. — ## 5. List Health, Segmentation, and Deliverability A large list is worthless if it doesn’t reach the inbox. **List health** is not glamorous, but it directly determines whether your investment in flows and campaigns pays off. ### The Segmentation Logic That Drives Revenue Build your segmentation around three axes: **recency** (when did they last purchase or engage), **frequency** (how often do they buy or open), and **value** (what’s their average order value and lifetime spend). These three dimensions — combined into an RFV model — let you build segments that behave predictably. Your highest-value, recently-active segment gets your best offers first. Your lapsed segment gets a win-back sequence. Your one-time buyers get nurture content designed to drive a second purchase. Beyond RFV, layer in **product affinity segments** (customers who buy from specific categories) and **channel preference data** (who clicks through email vs ignores it). Klaviyo makes this straightforward with its conditional split logic and predictive segment tools. ### Maintaining Deliverability at Scale Send frequency, engagement rate, and list hygiene are the three levers of deliverability. If you’re sending to disengaged contacts, inbox providers notice — and they start routing your emails to spam for your engaged contacts too. Remove or suppress contacts who haven’t opened in 180 days unless they’re within a defined win-back flow. Run a re-engagement campaign before suppressing, but suppress firmly if it fails. Clean lists outperform large lists every time. ### Growing Your List the Right Way Paid list growth — purchasing contacts or running sweepstakes with no brand qualification — poisons your programme. Grow your list through on-site capture (pop-ups, footer forms, checkout opt-in), post-purchase referral, and loyalty mechanics. Each of these sources delivers contacts with a genuine interest in your brand, which translates directly to higher open rates, better deliverability, and more revenue per subscriber. — ## 6. The Core Lifecycle Flows Every Ecommerce Brand Needs **Email automation ecommerce** performance lives or dies on the quality of your lifecycle flows. These are not set-and-forget. They’re built carefully, tested properly, and reviewed quarterly. ### The Welcome and Onboarding Flow Your welcome flow is the most valuable flow you’ll build. A new subscriber has just raised their hand — they’re at peak interest. The welcome flow should run three to five emails over seven to ten days: a warm brand introduction, your value proposition and social proof, a best-seller or category guide, and a time-limited incentive to drive first purchase. Don’t cram everything into email one. The sequence does the work. ### Abandoned Cart and Browse Abandonment Abandoned cart flows recover an average of 5–15% of abandoned carts, depending on sector and incentive strategy. A three-email sequence (45 minutes, 24 hours, 72 hours) consistently outperforms a single send. The first email is a simple reminder. The second adds social proof or addresses common objections. The third can introduce a modest incentive if margin allows. **Browse abandonment** (triggered when someone views a product but doesn’t add to cart) is underused and often outperforms cart abandonment on volume, because more people browse than abandon carts. A single, well-timed browse abandonment email with product imagery and a clear CTA captures intent at a much earlier stage. ### Post-Purchase, Win-Back, and VIP Flows The **post-purchase flow** is where you turn a transaction into a relationship. Confirm the order, set delivery expectations, then — once the product has been received — request a review, cross-sell a complementary product, and introduce your loyalty programme if you have one. Space these over 14–30 days depending on your average delivery time. **Win-back flows** target customers who haven’t purchased in a defined window (typically 90–180 days for your category’s purchase cycle). Lead with your strongest offer or a compelling story. If they don’t re-engage across a sequence of three to four emails, suppress them — don’t keep sending to silence. **VIP flows** recognise your highest-value customers with exclusive access, early product drops, and personalised outreach. These customers drive disproportionate revenue. Treat them accordingly. — ## 7. Campaign Strategy: From Ad Hoc Sends to a Revenue Calendar Flows build the foundation. Campaigns build the ceiling. Without a disciplined **ecommerce email strategy** for campaigns, you’re leaving revenue on the table every month. ### Building Your Commercial Calendar Map your campaign calendar to your trading plan, not the other way around. Start with the hard commercial dates: clearance windows, product launches, seasonal peaks (Valentine’s, Mother’s Day, Black Friday, Christmas). Then add brand-building moments: editorial sends, customer stories, behind-the-scenes content. Aim for a mix of approximately 60% commercial and 40% brand-building across the year — heavy commercial calendars burn through your list’s goodwill faster than most brands realise. ### Subject Line, Creative, and Offer Mechanics The subject line determines whether your campaign gets opened. Spend as much time on it as you spend on the email body. Test a value-led subject line against a curiosity-led one. Test personalisation tokens. Test length. In our experience, shorter subject lines (under 40 characters) consistently win on mobile for UK ecommerce audiences. Inside the email, lead with your strongest visual and your clearest CTA above the fold. Product imagery should be high-quality and load fast. Mobile renders before desktop for most UK email audiences — design mobile-first. ### Cadence and Fatigue Management How often should you send? More than most brands think, but less than the platforms encourage. Two to three campaigns per week is sustainable for brands with a broad product catalogue and a content team. One per week is the floor for staying relevant. The answer is segment-specific: your most engaged subscribers tolerate more frequency. Your less-engaged contacts need a lighter touch. Klaviyo’s smart sending and frequency capping tools let you manage this at the segment level — use them. — ## 8. Ecommerce Email Strategy for B2B Brands **B2B email nurture** requires a fundamentally different architecture. The purchase cycle is longer, the decision-making unit is broader, and the content that drives engagement is informational rather than promotional. ### Lead Nurture vs Customer Lifecycle B2B ecommerce brands need two parallel programmes: a lead nurture track for prospects working through the purchase decision, and a customer lifecycle track for accounts already transacting. The nurture track should deliver value at each stage of the buying journey — awareness content, product education, case studies, ROI calculators — gated behind progressive profiling forms that build your data asset over time. ### Account-Level Segmentation B2B email personalisation goes beyond individual preferences to account characteristics: industry vertical, company size, order frequency, account manager assignment. Klaviyo handles this reasonably well for SMB B2B. For complex enterprise B2B with large account portfolios, a CRM-integrated platform like Dotdigital or Salesforce Marketing Cloud is worth the additional investment. ### Integrating Email With Your Sales Team B2B email should feed your sales pipeline, not replace it. Build flows that trigger internal notifications to account managers when a prospect reaches a defined engagement threshold — for example, three email opens plus a product page visit. This enables timely, relevant outreach that feels personal rather than automated. The boundary between marketing email and sales follow-up is where B2B email programmes generate their highest-value conversions. — ## 9. Budget, Resource, and Effort: What to Expect at Each Stage One of the most common questions we field is: “What should we be spending on email?” The answer depends entirely on where you are in your growth journey. Here’s how we frame it. ### Investment by Growth Stage | Stage | List Size | Platform | Monthly Investment | Expected Email Revenue Share | |—|—|—|—|—| | **Early** (0–2 yrs) | Under 15k | Klaviyo Growth | £800–£1,500/mo | 15–20% | | **Growth** (2–5 yrs) | 15k–75k | Klaviyo Standard | £1,500–£3,500/mo | 22–30% | | **Scale** (5+ yrs) | 75k+ | Klaviyo Enterprise / Dotdigital | £3,500–£8,000+/mo | 30–40% | *Monthly investment includes platform licence, agency or in-house resource, and creative production. Platform licences are contact-volume based and vary.* ### In-House vs Agency An in-house email manager can own the channel effectively if they have the platform skills and the bandwidth to run both strategy and execution. The risk is capacity: email at growth stage requires consistent output — flows, campaigns, testing, reporting — that a single person managing other responsibilities often can’t sustain. An agency partner brings specialist skills, cross-client benchmarks, and dedicated capacity, but requires strong briefing and clear commercial alignment to deliver value. The hybrid model — an in-house owner plus an agency for strategic and creative heavy-lifting — is often the most effective configuration. ### The Cost of Not Investing The brands that underinvest in email consistently leave 10–20% of total revenue on the table. For a brand turning over £3m online, that’s £300,000 to £600,000 per year in foregone revenue. The cost of a well-run email programme is a fraction of that. The ROI calculation is not complicated. — ## 10. Measuring What Matters: KPIs That Drive Decisions Too many email programmes are measured on open rate. Open rate is a hygiene metric — it tells you whether you’re reaching the inbox. Revenue is the metric that tells you whether your programme is working. ### The Metrics That Matter Track these metrics weekly and review them monthly against targets: **Revenue per send (RPS)**: Total email-attributed revenue divided by number of sends. This is your programme’s most important commercial metric. For a brand with a 50,000-contact active segment, an RPS of £0.30–£0.60 on regular campaigns is healthy. On peak sends, £1.00+ is achievable. **Revenue per recipient (RPR)**: Segments RPS by the number of recipients in the send, making it comparable across sends of different sizes. **Flow revenue as a percentage of total email revenue**: Should be 35–50%. If it’s lower, your flows need attention. If it’s higher, your campaign programme needs building up. **List growth rate and churn rate**: Are you adding subscribers faster than you’re losing them? A net-negative list growth trajectory kills the channel’s future value. ### Attribution: How to Measure Email Revenue Accurately Email revenue attribution is complicated by cross-channel journeys. A customer might open an email, visit the site via paid search, and then convert. Most ESP-native reporting will attribute that conversion to email. Most paid media platforms will attribute it to paid search. Your total attributed revenue will exceed your actual revenue. Use a consistent attribution window (we recommend a 5-day click attribution and 1-day open attribution for most ecommerce brands) and cross-reference ESP reporting with your GA4 channel groupings. Don’t try to claim every conversion — claim the ones you can robustly support. — ## 11. Your 90-Day Plan to Build the Programme ### Step 1: Days 1–30 — Audit, Integrate, and Activate Core Flows Audit your current programme: platform configuration, data integration quality, existing flows, list health, and deliverability. Fix the data foundation first — ensure your Klaviyo-Magento or Klaviyo-Shopify integration is passing complete, real-time event data. Then build or rebuild your three highest-impact flows: welcome series, abandoned cart, and post-purchase. These three flows alone will generate a measurable revenue uplift within 30 days. Simultaneously, clean your list: suppress hard bounces, re-engage lapsed contacts, and build your core active segment. ### Step 2: Days 31–60 — Add Segmentation and Expand Your Flow Architecture Build your RFV segmentation model and tag your list accordingly. Add browse abandonment, win-back, and VIP flows. Review performance data from your first 30 days and optimise your core flows based on what the data shows — look especially at drop-off points in your welcome sequence and the optimal delay timing for your cart abandonment first send. Build your campaign calendar for the next 90 days and begin cadenced sends to your active, segmented audiences. Establish your weekly reporting rhythm. ### Step 3: Days 61–90 — Test, Optimise, and Scale Run structured A/B tests on your highest-volume sends: subject lines first, then CTAs, then send times. Use test results to inform your programme defaults. Review your flow performance quarterly and refresh any flow that hasn’t been updated in more than six months — customer behaviour, product ranges, and brand positioning all change, and your flows should reflect that. Set revenue targets by segment and flow for the next quarter and brief your team or agency accordingly. — ## 12. Key Takeaways – **Email should generate 25–40% of your total ecommerce revenue** — if it isn’t, the programme has structural gaps. – **Flows are your foundation.** Welcome, abandoned cart, and post-purchase flows alone will transform your baseline revenue. – **Klaviyo is the right platform for most UK ecommerce brands.** The ecommerce data model and flow builder are best-in-class for DTC and hybrid B2C/B2B brands. – **Magento integration quality determines everything.** Real-time event data is non-negotiable for effective abandonment flows. – **Segmentation beats volume every time.** A well-segmented list of 30,000 contacts outperforms a poorly segmented list of 100,000. – **Revenue per send is your primary KPI,** not open rate. Optimise for commercial outcomes, not engagement vanity metrics. – **B2B ecommerce email requires a different architecture** — parallel nurture and lifecycle tracks, account-level segmentation, and CRM integration. – **List hygiene protects deliverability.** Suppress disengaged contacts proactively. Clean lists generate more revenue per send. – **Campaigns need a commercial calendar,** not an ad hoc schedule. Map sends to your trading plan 90 days in advance. – **The cost of underinvesting is real.** For a £3m ecommerce brand, a poorly run email programme typically foregoes £300k–£600k annually. — ## 13. FAQ **How much revenue should email marketing generate for an ecommerce brand?** A mature, well-structured email programme should generate between 25% and 40% of total ecommerce revenue. The 20% figure often cited as an industry benchmark is the floor, not the target. Brands with complete lifecycle flows, disciplined campaign calendars, and proper segmentation consistently outperform it. If your email programme generates less than 20% of revenue, there are almost certainly structural gaps — missing flows, poor segmentation, or a data integration issue — that an audit will surface. **What is Klaviyo and why do most ecommerce agencies recommend it?** Klaviyo is an email and SMS marketing platform built specifically for ecommerce. Unlike general-purpose ESPs, its data model is built around ecommerce events — orders, products, cart actions, browse behaviour — which makes it significantly more powerful for lifecycle automation and revenue-driven segmentation. It integrates natively with Shopify and has robust connectors for Magento, WooCommerce, and most major ecommerce platforms. It’s the platform we use for the majority of our ecommerce clients and consistently delivers the best commercial results. **How do I integrate Klaviyo with Magento?** The standard route is Klaviyo’s official Magento extension, available on the Adobe Commerce Marketplace. This handles profile syncing, order data, and basic event tracking. For brands that need real-time cart abandonment triggers, product-level data attributes, or complex custom properties, we typically build a supplementary custom event layer on top of the standard connector. Get the integration reviewed by a developer who knows both platforms before relying on it — misconfigured integrations are one of the most common reasons email programmes underperform. **How often should an ecommerce brand send marketing emails?** For an actively engaged list with a broad product catalogue, two to three campaign sends per week is sustainable. For a smaller catalogue or a less content-rich brand, one to two sends per week is more appropriate. The right answer is segment-specific: your most engaged subscribers tolerate higher frequency; your less-engaged contacts need restraint. Use frequency capping in Klaviyo to manage this automatically, and monitor your unsubscribe rate by send frequency as a leading indicator of list fatigue. **What’s the difference between an email flow and an email campaign?** A **flow** (also called an automation or trigger sequence) is a series of emails that sends automatically in response to a specific subscriber action or behaviour — joining your list, abandoning a cart, making a purchase. Flows run continuously without manual input. A **campaign** is a one-time send to a defined segment, sent at a specific time — a promotional announcement, a seasonal send, a product launch. Flows generate passive, compounding revenue. Campaigns require ongoing planning and execution. A complete programme needs both. **What email flows should I build first?** Build in this order: welcome series, abandoned cart, post-purchase, browse abandonment, win-back. This sequence prioritises the flows with the highest revenue impact and the most straightforward setup. Once these are live and performing, expand to VIP flows, replenishment reminders, and product-specific cross-sell sequences. Don’t build all flows simultaneously — build them well, one at a time, and test each before moving to the next. **How do I improve my email deliverability?** Deliverability is determined by sender reputation, list quality, and engagement rates. To improve it: authenticate your sending domain (SPF, DKIM, DMARC — these are non-negotiable), suppress hard bounces and persistent non-openers, avoid spam trigger language in subject lines, send from a consistent sending address, and ramp up sending volume gradually after any domain change or list growth spike. If your open rates are declining without an obvious content reason, run a deliverability audit — your emails may be hitting spam folders for a segment of your list without you knowing. **What should I measure to know if my email programme is working?** The primary metrics are: **revenue per send**, **flow revenue as a percentage of total email revenue**, **list growth rate**, and **revenue attributed to email as a percentage of total ecommerce revenue**. Secondary metrics include open rate (as a deliverability indicator), click rate, conversion rate by flow and campaign, and unsubscribe rate. Review primary metrics weekly. Review secondary metrics monthly. Build a simple dashboard in Klaviyo or export to a Google Sheet — the discipline of weekly review catches problems early and drives consistent improvement. **Can email marketing work for B2B ecommerce brands?** Yes, but the architecture is different. B2B ecommerce brands need separate nurture and customer lifecycle tracks, account-level segmentation, longer send cadences aligned to longer purchase cycles, and integration with CRM or sales team workflows. The content is more educational and value-led, less promotional. For complex B2B with large account portfolios, a CRM-integrated platform like Dotdigital may serve you better than Klaviyo. For SMB B2B, Klaviyo handles the requirements well with some configuration. **How long does it take to see results from a new email programme?** Core flows (welcome, abandoned cart, post-purchase) generate measurable revenue within the first 30 days of going live, because they run continuously from the moment they’re activated. Campaign revenue builds over 60–90 days as you establish cadence, build list segments, and refine your creative and offer strategy. A complete programme — with all major flows live, a full commercial calendar, and proper segmentation — typically reaches its performance potential at the three-to-six-month mark. Don’t judge the programme at 30 days. **What makes a good email subject line for UK ecommerce?** Short (under 40 characters performs well on mobile), specific, and benefit-led or curiosity-led. Avoid ALL CAPS, excessive punctuation, and obvious spam phrases. Personalisation tokens (first name, location) add modest uplift for the right brand voice. Emojis work for some brands and alienate others — test before committing. The best subject line test framework is simple: test value-led (“20% off your next order”) against curiosity-led (“We held one back for you”) on the same campaign, to the same list split, measuring click-to-open rate as the primary metric. **Do I need an agency to run email marketing, or can I do it in-house?** You can run email in-house effectively with the right person and tools. The risks are capacity (email at growth stage is a full-time job if done properly) and platform expertise (Klaviyo has significant depth that takes time to master). An agency partner brings specialist skills, cross-client performance benchmarks, and dedicated capacity — particularly valuable for brands who need strategic input, creative production, and technical integration support simultaneously. The hybrid model — an in-house owner plus agency support — is often the most efficient configuration for brands between £1m and £10m ecommerce revenue. — ## Ready to Find Out What Your Email Programme Should Be Generating? If your email channel isn’t generating 25% or more of your ecommerce revenue, there’s a structural reason why — and it’s almost always fixable. We offer a free email programme audit for UK ecommerce brands: we review your platform configuration, integration quality, flow architecture, segmentation logic, and recent campaign performance, and give you a prioritised action plan with revenue projections. The audit takes us two to three days. It regularly surfaces £50,000+ in annual revenue opportunity. There’s no obligation beyond the conversation. **[Book your free email audit →]** or call us to talk through where your programme is right now. We’ve spent 15 years building email programmes that generate revenue every send — and we’d like to do the same for yours.