Email is still the highest-leverage owned channel for most ecommerce brands, because you control the list, the timing, and the data. This guide covers how a strong program is built, from list growth to measurement, and where brands usually leave revenue on the table.
Why email still matters
- You own it. Unlike social reach or ad costs, your list does not depend on an algorithm.
- It compounds. Flows keep earning after they are built, and a bigger list lifts every campaign.
- It lifts lifetime value. Repeat purchase is where profit lives in DTC, and email is the most efficient way to drive it.
- It supports paid. Strong email lowers blended acquisition cost by converting more of the traffic you already paid for.
The three parts of an email program
| Part | What it is | Role |
|---|---|---|
| Flows | Automated emails triggered by behavior (welcome, abandonment, post-purchase) | Steady, compounding revenue |
| Campaigns | One-time sends to a segment (launches, sales, content) | Spikes in revenue and brand presence |
| Foundation | List growth, data, deliverability, templates, reporting | Makes the other two work |
Most brands over-invest in campaigns and under-invest in flows. Build flows first.
Step 1: Build the foundation
List growth
- Use a two-step pop-up (offer, then email, then phone for SMS) rather than a wall of fields
- Add a footer and checkout opt-in
- Use quizzes and preference centers to collect zero-party data
- Make the incentive match your margin and brand. A discount is not always required; early access, bundles, or free shipping can work
Data and integrations
- Connect your ecommerce platform, reviews, loyalty, subscription, and support tools to your email platform
- Track key events: viewed product, added to cart, started checkout, placed order
- Clean up duplicate profiles and inconsistent properties early
Deliverability basics
- Authenticate your domain with SPF, DKIM, and DMARC
- Include a visible, one-click unsubscribe
- Keep complaint rates low and stop sending to long-term unengaged subscribers
- Warm up new domains or IPs gradually
Step 2: Build the core flows
| Flow | Trigger | Goal | Priority |
|---|---|---|---|
| Welcome series | New subscriber | Introduce the brand, drive first purchase | Must have |
| Abandoned cart | Added to cart, no checkout | Recover intent | Must have |
| Checkout abandonment | Started checkout, no order | Recover high intent | Must have |
| Browse abandonment | Viewed product, no cart | Re-engage browsers | High |
| Post-purchase | Order placed | Set expectations, build loyalty, cross-sell | Must have |
| Replenishment | Time since purchase for consumables | Drive repeat | High for consumable brands |
| Winback | No purchase in X days | Reactivate lapsed customers | High |
| Sunset | No engagement in X days | Protect deliverability | High |
Build these in order of revenue impact. For a deeper breakdown see Klaviyo Flows Every Ecommerce Brand Needs and Welcome Series Examples and Best Practices.
Step 3: Plan campaigns that earn their place
A good campaign calendar balances four types:
- Promotional: sales, launches, bundles
- Product-led: new arrivals, restocks, how-to content
- Brand and community: founder stories, reviews, user content
- Retention: VIP offers, loyalty updates, replenishment reminders
Rules that hold up:
- Every send has one goal and one call to action
- Segment before you send. Not every campaign should go to the full list
- Space promotions with value-driven sends so subscribers do not learn to wait for discounts
- Plan Q4 early. Warm up volume before BFCM rather than jumping from low to peak
Step 4: Segment for relevance
Start with a small set of high-value segments:
- Engaged vs unengaged (based on clicks and purchases, not opens)
- New customers, repeat customers, VIPs
- Lapsed customers
- Product or category interest
- Discount-driven vs full-price buyers
More segments are not always better. Each one should change what you send. See Email Segmentation Strategies That Move Revenue.
Step 5: Write and design for conversion
- Lead with the offer or the value, not a long preamble
- Keep one primary call to action
- Use real product imagery and clear, mobile-first layouts
- Write subject lines that are specific and honest
- Follow accessibility basics: readable fonts, alt text, strong contrast
- Remember that AI summaries in Gmail and Apple Mail now shape first impressions. See AI and the Inbox
Step 6: Protect deliverability
Deliverability is the multiplier on everything else. A great flow that lands in spam earns nothing.
- Monitor complaint rate, bounce rate, and inbox placement
- Remove hard bounces and chronic non-engagers
- Match sending volume to engagement
- Fix issues at the source: list acquisition quality, frequency, and relevance
For a full repair plan, read Email Deliverability for Ecommerce.
Step 7: Measure what matters
| Metric | Use it for | Caution |
|---|---|---|
| Revenue per recipient | Comparing campaigns and flows | Best primary metric |
| Click rate | Engagement | Reliable |
| Placed order rate | Conversion | Reliable |
| Unsubscribe and spam complaint rate | List health | Watch trends |
| Open rate | Directional only | Inflated by privacy features and AI inbox behavior |
| Email share of total revenue | Channel health | Compare against your attribution window |
| List growth rate | Foundation | Net of unsubscribes and bounces |
Use holdout groups to measure incremental revenue, not only attributed revenue.
Step 8: Test with discipline
- Test one variable at a time
- Run tests long enough to reach meaningful sample sizes
- Prioritize big swings (offer, structure, segment) over small ones (button color)
- Document results so learning compounds
Choosing a platform
For most Shopify and DTC brands, Klaviyo is the default because of its ecommerce integrations, segmentation, and flow tools. Other platforms may fit specific needs. If you are weighing a change, read Klaviyo Migration Checklist and consider timing around peak season.
When to hire an agency
Consider an agency when:
- Your flows are older than your last brand refresh
- Email revenue has plateaued despite list growth
- Your team is too busy sending campaigns to improve the program
- You need specialized help with deliverability, migration, or testing
See How to Choose an Email Marketing Agency.
Common mistakes
- Over-relying on discounts
- Sending the same message to the whole list
- Ignoring deliverability until revenue drops
- Building flows once and never revisiting them
- Judging success by open rate
- Skipping the post-purchase experience
Email program checklist
- ☐ Domain authenticated (SPF, DKIM, DMARC)
- ☐ Welcome, cart, checkout, browse, post-purchase flows live
- ☐ Winback and sunset flows live
- ☐ Core segments defined and used
- ☐ Campaign calendar planned 60 days ahead
- ☐ Revenue per recipient tracked by flow and campaign
- ☐ Holdout testing in place for at least one flow
- ☐ Quarterly flow audit scheduled
FAQ
How often should ecommerce brands email?
It depends on your list, product, and engagement. Start with a consistent baseline, then let segment-level engagement guide frequency.
What is a good email revenue share?
It varies by category and brand maturity. Track your own trend and compare against peers in your vertical rather than chasing a universal number.
Do I need SMS too?
Most brands benefit from both. See SMS Marketing for Ecommerce.
How ATTN helps
ATTN is a Klaviyo Platinum partner agency. We build and run email programs for ecommerce brands, from flow strategy and creative to deliverability and testing. Talk to our retention team about an email audit.