Consumer brands spend most of their marketing energy on the first purchase: ads, influencers, promotions. Much of the profit, though, comes from the second, third and tenth purchase. Email is still the lowest-cost channel for earning those repeat purchases. It’s also where a small amount of disciplined setup keeps paying off for years.
The mistake most brands make is treating email as a calendar of campaigns: a sale this week, a new product next week. Campaigns matter, but the dependable revenue comes from lifecycle flows. These are automated sequences triggered by what a customer does, not by what the marketing calendar says. Four flows carry most of the load.
1. The welcome flow
Trigger: someone subscribes or creates an account without buying.
Job: turn interest into a first purchase, and set expectations for the relationship.
A good welcome flow is usually three to five messages over one to two weeks.
– The first message arrives immediately, delivers whatever was promised at sign-up, and says plainly what the subscriber will receive and how often.
– Later messages answer the questions that stop a first purchase: how the product works, how sizing or fit works, what the return policy is, and what other customers say.
Common failure: leading every message with a discount. It converts in the short term, but it teaches new subscribers that the brand is always on sale. Consider saving the offer for the last message in the sequence, for people who have not yet bought.
2. The post-purchase flow
Trigger: a first order.
Job: make the first experience good enough to earn the second.
This is the most under-built flow in most brands, and one of the most valuable. The period between order and delivery is when a new customer pays most attention to the brand.
– Use it to confirm the order, set delivery expectations, and explain how to get the most from the product.
– After delivery, check in: ask whether everything arrived as expected, and make it easy to get help.
– Ask for a review only once the customer has had time to use the product.
Common failure: sending a promotional email for other products within days of the first order. The customer has not yet decided whether they like what they bought.
3. The replenishment or next-purchase flow
Trigger: time since last purchase, set by how the product is used.
Job: reach the customer at the moment they are likely to need more, or ready for something complementary.
For consumables such as skin care, supplements, coffee, pet food and cleaning products, the timing can be estimated from the product’s size and typical use. For durable goods, the next purchase is usually a complementary item or an accessory. The timing comes from your own order data: look at how long repeat customers usually wait before their second order, and time the message just before that point.
Common failure: one timing for every product. A 30-day reminder is early for a 90-day supply and late for a 14-day supply. Segment by product.
4. The win-back flow
Trigger: a customer has gone meaningfully longer than usual without buying.
Job: bring back lapsed customers, and learn why they left.
Define “lapsed” from your own data: for example, twice the typical time between orders. The sequence should do three things:
– remind the customer what they liked;
– show what is new;
– ask a direct question. A one-click “why haven’t you been back?” survey often produces more useful insight than any analytics tool.
If an incentive is used, keep it in this flow rather than in the general campaign calendar.
Common failure: emailing lapsed customers forever. After a win-back sequence with no engagement, stop sending, or reduce frequency sharply. That protects deliverability for everyone else on the list.
Measure flows by what they cause, not by clicks
Open rates are no longer reliable. Privacy features in major email clients can register opens that never happened. Measure flows by outcomes:
- Revenue per recipient for each flow, compared across months.
- Second-purchase rate among customers who went through the post-purchase flow, compared with a small holdout group who did not.
- Time to second purchase, and whether the replenishment flow shortens it.
- Unsubscribe and spam-complaint rates, which warn of fatigue before revenue drops.
A holdout group is the most honest measurement tool available. It is a small random share of customers who don’t receive a given flow. Without one, a flow gets credit for purchases that would have happened anyway.
Build once, review quarterly
Lifecycle flows are infrastructure. Build them carefully, then review them each quarter:
– update product references;
– retire messages that no longer perform;
– test one change at a time.
A brand with four well-built flows and a modest campaign calendar will usually outperform a brand that sends a campaign every day and has no flows at all.
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About the author: Jaivin Karnani is a growth marketing and operations executive based in Los Angeles / Pasadena. He has led lifecycle and e-commerce marketing at Zulily, Urgent.ly, Hilton and Sindulge.com, served as Chief Operating Officer of ClubExec Auto, and has worked on business development with Saroj International Inc., an SBA 8(a) federal contractor.