Open any healthy email program and you will find the same quiet truth: most of the revenue comes from emails no one decided to send that day. They were built once and now run on their own. These are the flows - and six of them do almost all of the work.
“A campaign is a decision you make every week. A flow is a decision you make once and get paid for all year.”
The welcome flow
The welcome flow is the only email a subscriber actively asked for, which makes it the highest-intent message you will ever send. Treat it like a first impression, not a discount drop.
We build it as three to five emails: who you are, why the product exists, and the proof that it works - with the offer arriving last, once there is a reason to care. The goal is a second visit, not a rushed first order.
Browse abandonment
Someone looked at a product and left. Browse abandonment is the gentlest nudge in the program, so it should read like a helpful reminder rather than a sales pitch.
Keep it to one or two emails, lead with the exact product they viewed, and answer the quiet objection - sizing, shipping, returns - before it has to be asked.
Cart & checkout abandonment
This is the flow most stores already have and most stores under-build. The intent here is the highest in the whole program: they were one step from buying.
Three emails, spaced over roughly a day, each removing a different reason to hesitate. Save the incentive for the last message - if you lead with a code, you train people to abandon on purpose.
The post-purchase flow
The order confirmation is the most-opened email you send, and most brands waste it. Post-purchase is where a buyer becomes a regular.
Set expectations, teach them to get the most from what they bought, then ask for the review at the moment the product has actually arrived and been used - not the day it ships.
Replenishment & cross-sell
If your product runs out, timing is the entire strategy. A replenishment email that lands the week someone is about to reorder is worth more than any campaign.
For products that do not run out, the same slot becomes a considered cross-sell - the natural next thing, based on what they already own, not a catalogue dump.
Win-back & sunset
Every list has people drifting away. A win-back flow gives them one good reason to come back; a sunset flow quietly stops mailing the ones who never will.
This is the flow that protects your deliverability. Letting go of dead weight is what keeps the inbox placement high for everyone still paying attention.
The short version
Build the six in order, design them to look like the rest of your brand, and resist leading with a discount. Do that and the flows quietly become the most reliable revenue line you have - the part of the program that works while you sleep.