# Segments

> Mailrith Segments creates reusable subscriber groups from tags, custom fields, status, forms, sequences, and activity rules.

- Human page: https://mailrith.com/features/segments
- Markdown page: https://mailrith.com/features/segments.md
- Feature category: Send More Relevant Emails
- Primary keyword: email subscriber segments
- Related keywords: email marketing segmentation, subscriber segmentation, dynamic email segments, newsletter segmentation
- Last reviewed: 2026-07-12

## Direct Answer
Segments are saved groups of subscribers. Use them to send to the same type of subscribers without rebuilding filters each time.

- Combine tags, custom fields, status, forms, sequences, and activity.
- Preview matching subscribers before you use a segment.
- Reuse segments in broadcasts, sequences, and automations.

## What This Feature Helps You Do
- **Saved Groups You Can Reuse:** A segment saves a subscriber group once so you can reuse the group across emails.
- **More Relevant Sends:** Send different messages to engaged subscribers, trial users, customers, event signups, or interest groups.
- **Cleaner Decisions:** Preview a segment before sending so you can find broken rules before a real email goes out.

## When To Use This Feature
- You repeatedly send to the same type of subscriber group.
- The group should update automatically when tags, custom fields, status, or behavior changes.
- You need subscriber rules that combine more than one condition.

## When This May Not Be The First Thing To Set Up
- You only need a one-time filter and will not reuse the subscriber group.
- The tags or custom fields used by the segment are messy or unclear.
- You cannot explain which subscribers should be included and which subscribers should be excluded.

## A Simple Setup Path
1. First, write in plain language which subscribers should be in the segment.
2. Choose the custom fields, tags, status, and activity rules the segment needs.
3. Build the segment with the smallest clear rule that matches the subscribers you want.
4. Preview the matching subscriber count and check sample subscribers for expected matches.
5. Use the segment in a test email before you rely on it for a large send.

## Common Mistakes To Avoid
- **Building Rules Nobody Understands:** If a segment rule is too hard to explain, the segment will be hard to trust during a send.
- **Forgetting Exclusions:** Define who should not receive the email, not only who should receive it.
- **Using Stale Data:** A segment depends on accurate tags, custom fields, and subscriber status.

## How This Connects With The Rest Of Mailrith
- Tags and custom fields provide common rules for segments.
- Broadcasts use segments to choose which subscribers receive an email.
- Sequences can filter subscribers with similar rules.
- Automations can branch based on subscriber data.

## Keep Exploring
- [Segments Guide](https://mailrith.com/docs/segments.md): Build reusable subscriber groups, preview matching subscribers, and use segments across sends.
- [Tags](https://mailrith.com/features/tags.md): Mailrith Tags help organize subscribers by source, interest, stage, behavior, and email sending rules.
- [Custom Fields](https://mailrith.com/features/custom-fields.md): Mailrith Custom Fields store subscriber details for personalization, segments, forms, imports, and automation rules.
- [Broadcasts](https://mailrith.com/features/broadcasts.md): Mailrith Broadcasts help you write, select subscribers, test, schedule, send, and review one-time emails.

## Related Email Sending Setup Pages
- [Amazon SES Email Marketing](https://mailrith.com/features/amazon-ses-email-marketing.md): Use Mailrith with Amazon SES for email marketing campaigns, newsletters, forms, automations, and reports while Amazon SES handles delivery.
- [Postmark Email Marketing](https://mailrith.com/features/postmark-email-marketing.md): Postmark Email Marketing with Mailrith: run campaigns, newsletters, forms, automations, and reports while Postmark handles delivery.
- [SendGrid Email Marketing](https://mailrith.com/features/sendgrid-email-marketing.md): SendGrid Email Marketing with Mailrith: run campaigns, newsletters, forms, automations, and reports while SendGrid handles delivery.