Segment and filter your audience

A segment is a slice of your audience defined by rules — for example "everyone tagged customer who is on the Newsletter list." Sending to the right segment (instead of your entire list) gets better opens, fewer unsubscribes, and protects your sender reputation.

Where you build a segment

You don't usually pre-create segments — you build them inside the campaign's Audience step (or when choosing who an automation affects). When you pick your audience, you can filter by:

• List — people on a specific list.
• Tag — people who have (or don't have) a tag.
• Custom field — e.g. plan = pro, or city = London.

As you add filters, Mailbo shows a live recipient count so you always know how many people match before you send.

Example: a targeted send

Say you want to email US customers about a new feature:

1. Start a campaign and go to the Audience step.
2. Add a filter: tag is customer.
3. Add another: custom field country is US.
4. Watch the recipient count update.

Only contacts matching all your filters receive the email.

Who's always excluded

Mailbo automatically removes these from every send, so you never have to think about it:

• Unsubscribed contacts.
• Bounced contacts (emails that hard-failed).
• Unconfirmed contacts, if double opt-in is on.

This is why your recipient count is often a bit lower than your total contact number — that's a good thing.

Next: What happens when someone unsubscribes