# Segments

> Mailrith Segments create 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: 2026-05-25

## Direct Answer
Segments are saved groups. They help you send to the right subscribers without rebuilding the same filters every time.

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

## What This Feature Helps You Do
- **Saved Groups You Can Reuse:** A segment saves a useful group once so you can use it across emails.
- **More Relevant Sends:** Send different messages to engaged subscribers, trial users, customers, event signups, or interest groups.
- **Cleaner Decisions:** Previewing a segment helps catch broken logic before a real email goes out.

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

## When This May Not Be The First Thing To Set Up
- You only need a one-time filter and will not reuse it.
- The underlying tags or custom fields are messy or unclear.
- You cannot explain who should be included and who should be excluded.

## A Simple Setup Path
1. Write who should be in the segment in plain language first.
2. Choose the fields, tags, status, and activity rules needed.
3. Build the segment with the smallest clear rule.
4. Preview the matching count and check sample subscribers.
5. Use the segment in a test email before relying on it for a large send.

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

## How This Connects With The Rest Of Mailrith
- Tags and custom fields provide common segment rules.
- Broadcasts use segments to choose who receives an email.
- Sequences can filter subscribers by similar rules.
- Automations can branch based on subscriber details.

## Keep Exploring
- [Segments Guide](https://mailrith.com/docs/segments.md): Build reusable subscriber groups, preview matches, 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, choose subscribers, test, schedule, send, and review emails you send once.

## Related Email Sending Setup Pages
- [Amazon SES Email Marketing](https://mailrith.com/features/amazon-ses-email-marketing.md): Amazon SES email marketing with Mailrith: run 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.