What a sequence actually is
An automated email sequence is a series of pre-written messages that goes out based on a trigger — someone signs up, adds an item to a cart, or stops engaging — rather than a single one-off blast sent to everyone at once. Each message in the sequence has a defined delay before the next one, and the whole sequence is built once, then runs continuously in the background for every new person who meets the trigger condition.
The diagram below shows the basic shape every sequence in this chapter follows: something happens, a message goes out, time passes, another message goes out — repeated until the sequence ends.
Every sequence type below follows this same shape — only the trigger, timing and content change.
Welcome sequences: first impressions at scale
The welcome sequence triggers the moment someone signs up — for a newsletter, a lead magnet, an account. It's the highest-attention window you'll ever get with a new contact, because they just took a deliberate action and your business is fresh in their mind. A typical welcome sequence runs three to five emails spaced a few days apart rather than firing all at once: the first sets expectations (what they'll get, how often), the middle ones deliver on the promise and introduce what makes the business worth paying attention to, and the last points toward one clear next action — a booking link, a product page, a reply prompt.
The core principle is to keep each email focused on a single idea and a single next step. A welcome email trying to explain your entire product catalogue, your company history and three separate calls to action in one message accomplishes none of them well.
Nurture sequences: staying relevant between now and ready-to-buy
Not every lead is ready to buy the moment they show interest — for anything with a real consideration period, most aren't. A nurture sequence is built for that gap: a longer-running series, spaced days to weeks apart depending on your typical sales cycle, mixing genuinely useful content with occasional, low-pressure invitations to take the next step. The timing principle here matters more than the content — space messages according to how long people actually take to decide, not on an arbitrary daily or weekly clock. A sequence for a same-day service and a sequence for a considered B2B purchase should not share the same cadence.
A nurture sequence should have a defined end. Nurturing forever with no clear off-ramp either wears out its welcome or quietly becomes noise the recipient has learned to ignore — better to run it for a defined period, then move non-responders into a re-engagement sequence (below) or a lower-frequency list.
Abandoned cart sequences (for e-commerce)
If you sell online, an abandoned cart sequence triggers when someone adds an item to their cart or starts checkout but doesn't complete the purchase. This is one of the highest-value sequences to build because the intent signal is so strong — they were seconds from buying. Typically one to three emails over a few days: the first is a gentle reminder sent within a few hours ("still thinking it over?"), the second (a day or two later) can address common hesitations — shipping cost, return policy, sizing — and a final message, if used, might include help or an incentive to close the gap.
The general timing principle for this sequence specifically: relevance decays fast. A reminder sent within hours captures genuine forgetfulness or a distraction; the same reminder sent two weeks later reads as generic marketing because the moment of intent has passed.
Re-engagement sequences: winning back the quiet ones
A re-engagement sequence triggers on inactivity — no opens or clicks over a defined stretch, say the last several months. Rather than continuing to send to an unresponsive address indefinitely (which drags down deliverability, as covered in Chapter 2), this sequence asks directly: are you still interested? It should make it just as easy to say "yes, keep sending" as to unsubscribe or adjust preferences — the goal is either winning back genuine attention or cleanly removing a dead contact, not guilt-tripping someone into staying on a list they've stopped reading.
- Define the trigger precisely — what event, exactly, starts this sequence.
- Define one goal — the single action you want by the end.
- Map spacing to real behaviour, not a default daily send.
- Write each email for one reader, not a crowd — sequences read better in a personal voice.
- Always include a clear, honoured exit ramp.
- Send yourself the full sequence before turning it on live.
A sequence isn't a set of emails — it's a decision tree with delays: trigger, wait, message, wait, message, until the goal is reached or the sequence ends.
Once sequences exist, the next lever is making sure the right person gets the right version of them — which is what segmentation and personalization, covered next, are for.