Segments

A segment is a saved filter over a list — a living group defined by rules rather than a fixed membership. Target segments instead of whole lists to send more relevant email, lift engagement, and protect your sender reputation.

Why segment

Sending everything to everyone trains recipients to ignore you and pushes mailbox providers to filter you. Segments fix this by letting you reach only the people a message is right for. The result is higher open and click rates, fewer unsubscribes, and better deliverability over time.

How segments work

You define one or more conditions, and the segment automatically includes every contact in the list who matches. Because it's rule-based, a segment updates itself as your data changes — new contacts who match are included, and contacts who no longer match drop out, with no manual upkeep.

What you can segment on

Custom fields — location, plan, company, interests, or anything you store. See Custom fields.
Engagement — who opened or clicked recent campaigns (great for re-engagement).
Status and dates — when a contact was added, and their subscription state.
Tags — labels applied manually or by automations.

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Automations can build segments for you: tag everyone who clicks a campaign, then target the “clicked” tag in your next send.

Using segments

Select a segment as the recipients of a campaign, or use it to decide who enters an automation. Your plan sets how many segments you can save per list. Combine thoughtful segmentation with strong subject lines for the best results.

Segment ideas to steal

Engaged readers — opened or clicked in the last 30–90 days; your most responsive audience.
Lapsed contacts — no engagement recently; perfect for a re-engagement automation.
New subscribers — added in the last week; ideal for a welcome message.
By attribute — location, plan, or interest from your custom fields.

Frequently asked questions

Do segments update automatically? Yes. They're rule-based, so contacts join or leave a segment as their data and behavior change — no manual upkeep.

Is a segment the same as a list? No. A list is the contacts themselves; a segment is a saved filter over a list.