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Automated Email: The Cheapest Tool to Retain Customers

Acquiring a new customer costs 5 times more than keeping one -- and email is still the most profitable channel to do it.

EcommerceJohn LindgrenJuly 7, 20252 min read

Why does email keep winning?

Social media algorithms change every week. Paid ads get more expensive every quarter. But email keeps delivering, with an average ROI of $36 for every dollar spent according to Litmus.

The best part: you don't need a massive list. With just 200 or 300 real contacts, you can see results if you send the right message at the right moment.

The trick isn't sending pretty newsletters. It's automating the moments that matter.

The 4 flows every store should have

Don't try to build 15 automations at once. Start with these four and adjust from there:

FlowWhen it triggersWhat it does
WelcomeOn signupIntroduces your brand, offers a first-purchase perk
Abandoned cart1-4 hours after abandonmentReminds them of the products, addresses objections
Post-purchase2-3 days after deliveryAsks for feedback, suggests complementary products
Re-engagement60-90 days without a purchaseOffers an incentive to come back

The welcome and abandoned cart flows have the biggest immediate impact. If you can only set up two, make it those.

Tools that work well

Not every email platform handles local payment integrations or regional needs equally well. These are the ones I've seen work best:

  • Klaviyo: the most powerful for ecommerce. Integrates directly with Shopify. Free plan up to 250 contacts.
  • Mailchimp: more general-purpose but solid. Good if you sell through multiple channels.
  • Shopify Email: basic but included in your plan. Works well for getting started without the complexity.

The tool matters less than making sure your flows are active and your copy sounds human. Nobody wants to read an email that sounds like a corporate robot.

Mistakes I see all the time

  • Writing like a catalog: "Dear customer, we are pleased to inform you of our new products." Talk like a real person.
  • Zero segmentation: sending the same message to someone who bought yesterday and someone who hasn't purchased in 6 months.
  • Ignoring the subject line: 47% of people open an email based on the subject line alone. Spend time writing it.
  • Not measuring: if you're not checking open rates and clicks at least once a month, you're shooting blind.

Start today, not tomorrow

Email automation isn't a three-month project. You can have your first welcome flow running in a single afternoon. You refine it later with real data.

If you need help setting up these flows in your store, at Mi Primera Tienda we do this all the time. Reach out and let's talk.

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