Email Automation: Trigger Emails and Sequences That Sell

The short answer

A trigger email is sent automatically in response to what someone does or stops doing: signs up, abandons a cart, buys, goes quiet. A sequence is several such emails with delays and conditions.

Start with four sequences:

What you need to launch

• An email platform with automation: triggers, delays, conditions, exit rules.
• Event data from your site or CRM: signup, cart, order. Usually through a built-in CMS or store integration, or via API and webhooks.
• Exit conditions: if the person buys, the cart sequence must stop immediately.
• Marketing consent: order confirmations are transactional, but marketing reminders require a subscription.

Welcome sequence

Starts right after signup. A sample structure:

1. Immediately — thanks, the promised resource, what comes next.
2. A day or two later — the main benefit of your product or your best content.
3. A few days after that — social proof: reviews, use cases.
4. Then — a soft offer or an invitation to the first action.

Metrics: share of people reaching the first key action (purchase, inquiry, activation), clicks, unsubscribes at each step.

Abandoned cart

The sequence with the most obvious payoff, and the easiest to overdo.

1. A few hours later — a reminder with the product, image and a button back to the cart.
2. After a day — answers to doubts: delivery, returns, payment options, reviews.
3. Later still — if you choose, an incentive: free delivery or a gift. Do not put a discount in every sequence, or customers will learn to abandon carts on purpose.

For this to work, the site must know the person's email, which means they are logged in or entered it at checkout.

Metrics: recovered cart rate, revenue from the sequence, unsubscribes and complaints.

Post-purchase

The buyer has already trusted you, which makes this the best moment to build the relationship.

1. Immediately — order confirmation (transactional) with clear timelines.
2. After delivery — instructions, usage tips, support contacts.
3. Some time later — a request for a review.
4. Matched to your product cycle — complementary products or a replenishment reminder.

Metrics: number of reviews, repeat purchase rate, support requests (good instructions reduce them).

Re-engagement

Fires when someone has not opened or clicked for a long time, or has not bought in a while. Set the threshold by your own cycle: shorter for daily-use products, longer for rare purchases.

1. "It has been a while" — what is new, the best of the period.
2. A reason to come back: a selection, a useful resource, an offer.
3. A direct question: "Stay on the list?" with "Yes" and "Unsubscribe" buttons.

Remove those who do not respond from regular sends to protect deliverability.

Metrics: share of contacts that become active again, unsubscribes (normal and even healthy here).

How to evaluate sequences

• Judge each sequence by its own goal metric, not opens: open rates are distorted by mail app privacy protection.
• Tag links with UTM parameters so revenue shows up in analytics.
• Compare against a control group that does not receive the sequence: it shows real lift, not purchases that would have happened anyway.
• Change one thing at a time: timing, subject, offer.

Common mistakes

• No exit condition: the customer bought, but cart emails keep coming.
• Several sequences hit the same person at once.
• Set and forget: broken links, products no longer for sale.