Definition
An email automation campaign (also referred to as an automated campaign, drip campaign, or triggered campaign) is a series of emails sent automatically based on predefined triggers, schedules, or subscriber behaviours. Unlike broadcast (one-time) campaigns sent to a selected audience at a single point in time, automation campaigns run continuously and respond dynamically to individual actions. Common triggers include website visits, purchases, sign-ups, cart abandonment, email engagement, and elapsed time intervals.
Automation campaigns are categorised into always-on and timed types. Always-on campaigns fire whenever a triggering event occurs and continue indefinitely. Timed campaigns are scheduled around specific dates. Both rely on conditional logic to determine which emails a subscriber receives.
Automation campaigns consistently outperform broadcast campaigns, with conversion rates 2 to 5 times higher. This performance lift stems from relevance — automated emails reach subscribers when they have demonstrated intent. A welcome series can generate 4x the open rate and 5x the click-through rate of standard promotional mailings, according to industry benchmarks.
Best Practices
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Map each automation campaign to a specific subscriber intent or lifecycle stage. A welcome campaign serves new subscribers; a re-engagement campaign targets inactive ones. Matching the campaign type to the subscriber's current state improves relevance and reduces unsubscribe rates.
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Set clear entry conditions and exit logic for every flow. Define which trigger events start the campaign, what actions cause a subscriber to exit (e.g., making a purchase during a browse recovery flow), and how long a subscriber remains in the sequence before being removed or passed to another campaign.
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Apply send-time optimisation and frequency caps to automation campaigns. Even triggered emails can annoy subscribers if sent too aggressively. Limit the number of messages per day or week within a single flow, and use engagement data to adjust send times for each recipient.
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Monitor campaign-specific metrics separately from broadcast performance. Track conversion rate, revenue per recipient, and flow completion rate for each automation. These figures reveal which flows are driving value and which need refinement or retirement.
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Build fallback and escalation paths into multi-step sequences. If a subscriber does not engage after a certain number of messages, transition them to a lower-frequency flow or a re-engagement campaign rather than continuing to send at full cadence.
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Regularly audit automation campaigns for relevance drift. Subscriber expectations and business offerings change over time. Review each campaign's copy, offers, and trigger conditions at least quarterly to ensure they remain aligned with current strategy.
Related Glossary Terms
Abandoned Cart Email
An abandoned cart email is an automated message sent to customers who added items to their online shopping cart but left without completing the purchase. It is one of the highest-converting email types in ecommerce.
Drip Campaign
A drip campaign is an automated sequence of pre-written emails sent on a schedule or triggered by specific subscriber actions. It nurtures leads, onboard new users, or re-engage dormant subscribers over time.
Email Automation Migration
Email automation migration involves transferring automated workflows, triggers, templates, and historical data from one email service provider to another while maintaining campaign continuity.
Email Automation
Email automation is the use of software to send targeted, triggered emails to subscribers based on predefined rules, behaviours, or schedules without manual intervention.
Email Autoresponder
A legacy email automation system that sends a single pre-written response triggered by a specific subscriber action such as subscription or inbound message.
Behavioural Email Targeting
Event-driven email triggers based on subscriber actions: page views, downloads, purchases, login frequency. Custom event tracking, behavioural scoring, trigger recency windows, and cooldown periods.
Frequently Asked Questions
A broadcast campaign is a one-time send to a selected list at a specific moment. An automation campaign is triggered individually by subscriber behaviour and runs continuously. Broadcasts are ideal for announcements and promotions; automations handle ongoing lifecycle communication such as welcome, cart recovery, and post-purchase follow-up.
The most common types are welcome series, abandoned cart flows, post-purchase sequences, re-engagement (winback) campaigns, birthday or anniversary messages, and browse abandonment recovery. Each addresses a distinct moment in the subscriber lifecycle and uses different trigger conditions.
Measure automation campaigns by flow-specific KPIs including conversion rate, revenue per recipient, click-through rate, flow completion rate, and time-to-conversion. Compare these against broadcast campaign benchmarks to quantify the incremental value of automated messaging.
There is no fixed number, but most high-performing welcome sequences use 3 to 5 emails, abandoned cart flows use 2 to 4 emails, and post-purchase sequences use 3 to 6 emails. The optimal length depends on the complexity of the subscriber journey and the tolerance of your audience.
Yes. Test trigger timing (immediate vs delayed send), email count within the flow, subject line variants, offer types, and send frequency. Because automation campaigns run continuously, you can accumulate statistically significant results faster than with periodic broadcast tests.