Managed service 03 / 27
Email Marketing
Turn your list into your most profitable channel.
Campaigns, automated flows and behaviour-based segmentation that make owned email your highest-return channel — designed, built, scheduled and continuously improved.
Sentry's Email Marketing service designs, builds and runs campaigns, always-on automated flows and behaviour-based segmentation across the list you already own, so the highest-margin channel you have stops sitting idle.
What Email Marketing delivers
Always-on flows
Welcome, abandoned-cart, post-purchase and win-back automations working 24/7.
Segmentation
Behaviour- and value-based audiences so the right message finds the right person.
Deliverability
List hygiene and sender trust so messages reliably land in the inbox.
Representative stack
Mailchimp
Klaviyo
Customer.io
SendGrid
Mailjet
MailgunKPIs we move — measured, owned, reported
Every KPI is tied to a named owner and a target agreed up front — so this service is accountable to outcomes, not activity, for every stakeholder who consumes the value.
Capability Maturity — we walk you up the five levels
Operated at Level 4 · Quantitatively Managed — measured, predictable and owned. We track this rank and raise it over time. See the five levels →
Why this matters
Functional value, value-stream value — and why it can't be ignored.
Designs, builds and runs campaigns, always-on automated flows and behaviour-based segmentation across the list you already own.
The compounding-retention stage: it converts one-off acquisition into repeat revenue and lifetime value at near-zero marginal cost — the highest-margin channel in the business.
An unworked list is revenue you have already paid for and left on the table. Every day without flows is carts not recovered, customers not reactivated and sender trust decaying — money you are choosing not to collect.
One data layer · measured & owned
Every service creates data — captured, measured, owned.
Email Marketing doesn’t just run — it generates signal. We land that data in one warehouse and turn it into live KPIs tied to a named owner, so performance is attributable and acted on, never trapped inside a single tool.
Data warehouse
Supabase
Snowflake
Keboola
BigQuery KPIs, dashboards & apps
Plotly
Retool
Apache Superset Platform-agnostic — we connect what you already use and add a warehouse only where it earns its place.
How we select technology
We choose technology last — for the outcomes it has to earn.
Never tech for its own sake. A tool joins the stack only where it measurably protects value, cuts cost or unlocks speed — fit to a designed system, owned where it counts, and measurable from day one. How we select technology →
Speed
Modern, edge-served stacks are sub-second. Slow surfaces cost conversion and SEO every single day.
Cost
Cut licence, hosting and per-task SaaS fees — pay for capability, not lock-in or idle enterprise tiers.
Security
Flat, edge architecture with almost nothing left to attack — fewer moving parts, smaller surface.
Ownership & no lock-in
Composable and self-hosted where it counts — you own the system, not rent someone else’s.
Measurability
Clean data and KPIs baked in — you cannot improve, automate or apply AI to what you cannot measure.
Fit to process
The right tool for a designed system — selected against process readiness, so it amplifies, not adds friction.
How we deliver · DMAIC
Every Email Marketing engagement runs on DMAIC.
Define the goal and its value, measure the baseline, analyse the real constraint, improve with a proven build, then control the gains — so results are predictable, repeatable and defensible, not down to luck.
Agree the goal, value, budget & timescale up front.
Baseline the KPIs above — current state, not guesswork.
Diagnose the real constraint and the solution needed.
Build the chosen solution; prove the uplift.
Lock in the gains; monitor and sustain them.
FAQ
Common questions
Which automated email flows do you build?
Welcome, abandoned-cart, post-purchase and win-back flows, running continuously rather than as one-off sends. These are the automations that recover revenue you have already paid to acquire, which is why Sentry builds them before adding more campaign volume on top.
Our emails end up in spam. Can that be fixed?
Usually, and it is treated as a foundation rather than an extra. Sentry works on list hygiene and sender trust, because deliverability decays quietly: every send to a stale list costs a little more reputation, until messages that people asked for stop arriving. There is no point improving the copy of an email nobody receives.
We already have a list but we barely use it. Is that enough to start?
It is the strongest starting position there is. An unworked list is revenue you have already paid for and left on the table — carts not recovered, customers not reactivated, sender trust decaying. Sentry starts by segmenting what you already own by behaviour and value before spending anything on acquiring more names.
How is this different from just sending more emails?
Volume without segmentation accelerates list decay. Sentry builds behaviour- and value-based audiences so the right message reaches the right person, and measures the channel on revenue contribution rather than opens. Sending more to everyone is the reliable way to make an email programme worse.
What does managed email marketing cost?
Sentry's managed services start at £3,000 per month, scoped to the work and including selected tool costs. Across an engagement, investment is typically 3–5% of turnover to protect existing value, 5–8% to improve performance and 8–15% to create new growth, anchored to a financial value model agreed before significant spend.
Does email work on its own, or does it need the paid side too?
It works on its own and compounds when paired. Owned email is where acquired demand is converted and repeat value is created, which is why Sentry runs paid media and owned email as one engine feeding the same pipeline where a client takes both.
Start here · the free first step
Email Marketing starts the same way every engagement does: with Discovery.
Two distinct moves — a free, no-obligation Discovery Session to find your value at stake, then the Discovery & Blueprint: 14 structured outputs — value model, roadmap and business case — before a pound of delivery is committed.
Engaged alone or as one engine