Segments
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.

Practical Use
What This Feature Helps You Do
See the everyday task this feature supports and the small decisions it helps you avoid handling by hand.
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.
Setup Steps
Simple Setup Steps
Follow these steps before you add more complex setup or automation.
- 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.
Avoidable Problems
Common Mistakes To Avoid
Watch for these mistakes because they can make basic email setup and sending harder to troubleshoot.
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.
Works With Other Features
How This Connects With The Rest Of Mailrith
Email work often uses several Mailrith screens. Use this section to see where Segments connects to related Mailrith features.
- 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
Continue from this feature overview to setup instructions, related features, and nearby workflows.
Setup Details
Segments Setup
Build reusable subscriber groups, preview matching subscribers, and use segments across sends.
Related Feature
Tags
Label subscribers by interest, source, stage, product, behavior, or another simple yes-or-no marker.
Related Feature
Custom Fields
Store structured subscriber details such as company, plan, date, location, score, or any other detail you want to reuse.
Related Feature
Broadcasts
Send one-time newsletters, product updates, launch emails, announcements, and promotions to the subscribers you select.
Email Delivery Services
Related Email Delivery Services
Compare these services when you are deciding which one should send your emails.
Amazon SES And Mailrith
Amazon SES Email Marketing
Use Mailrith to manage subscribers, forms, broadcasts, sequences, automations, and reports while Amazon SES handles email delivery.
Postmark And Mailrith
Postmark Email Marketing
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SendGrid And Mailrith
SendGrid Email Marketing
Use Mailrith for subscribers, forms, broadcasts, sequences, automations, and reports while SendGrid handles email delivery.