The Base Sending Segment Setup Guide
Stop sending to your entire list. Build a base sending segment that reaches fewer people but generates more total clicks, with 30%+ open rates and protected sender reputation.
Save this for later
Get the printable PDF and a Notion template you can duplicate
Build Your Base Sending Segment
Include subscribers who match any of these 3 engagement criteria. Check each criterion you plan to include.
- Recent Signups : Signed up in the last 10 days. These subscribers are in the honeymoon phase with the highest open rates.
- Recent Openers : Opened 1+ email in the last 30 days. These subscribers have demonstrated active interest.
- Recent Clickers : Clicked 1+ link in the last 60 days. These are your highest-engagement subscribers.
The Counterintuitive Truth
Sending to fewer people generates more total clicks. When you only email engaged subscribers, your open rates climb above 30%, ISPs reward you with better inbox placement, and the subscribers who do receive your emails are far more likely to click. A smaller, engaged segment outperforms a large, disengaged list every time.
Platform Setup Instructions
Follow the setup steps for your email platform. Make sure your segment is dynamic (auto-updating), not static.
| Platform | How to Create the Segment | Key Setting |
|---|---|---|
| Mailchimp | Audience > Segments > Create Segment. Add conditions: subscribed date within last 10 days OR opened any campaign in last 30 days OR clicked any campaign in last 60 days. | Use 'any' (OR logic) to combine conditions, not 'all' (AND logic). |
| ConvertKit | Subscribers > Create a Segment. Add filters: added within 10 days OR opened in last 30 days OR clicked in last 60 days. | Segments auto-update in ConvertKit. Verify filters use OR logic. |
| Omnisend | Audience > Segments > Create Segment. Use event-based conditions for signup date, opens, and clicks. | Enable 'auto-refresh' so the segment updates before each send. |
| Beehiiv | Audience > Segments > New Segment. Filter by subscription date, open activity, and click activity. | Beehiiv segments are dynamic by default. Double-check date ranges. |
| ActiveCampaign | Contacts > Segments > Create Segment. Add conditions for subscription date, last opened, and last clicked with OR logic. | Use 'matches any' for OR logic. Set segment to update automatically. |
Critical Setting
Always create dynamic segments that auto-update, not static lists. A static segment captures subscribers at a point in time and never changes. A dynamic segment automatically adds new subscribers who meet the criteria and removes those who no longer do. This ensures your base segment stays fresh with every send.
Weekly Metrics Tracker
Track these 8 metrics weekly to measure the impact of your base sending segment. Fill in your before numbers and track each week.
| Metric | Before Base Segment | Week 1 | Week 2 | Week 3 | Week 4 |
|---|---|---|---|---|---|
| Open Rate | |||||
| Click-Through Rate | |||||
| Total Opens | |||||
| Total Clicks | |||||
| Unsubscribe Rate | |||||
| Spam Complaints | |||||
| Base Segment Size | |||||
| Total List Size |
Gradual Expansion Strategy
Start strict, then gradually expand your segment as your sender reputation improves. Only move to the next phase when you hit the success signal.
| Phase | Timeframe | Who You Send To | Success Signal to Move On |
|---|---|---|---|
| Phase 1: Strict | Weeks 1-4 | Opened in last 30 days OR signed up in last 10 days OR clicked in last 60 days | Open rate consistently above 30% |
| Phase 2: Expand | Weeks 5-8 | Opened in last 60 days OR clicked in last 90 days | Open rate consistently above 25% |
| Phase 3: Maintain | Ongoing | Opened in last 90 days OR clicked in last 120 days | Sustained metrics with stable or growing segment size |
- Phase 1 complete : Open rate consistently above 30% for 4 weeks
- Phase 2 complete : Open rate consistently above 25% for 4 weeks
- Phase 3 active : Maintaining healthy metrics with expanded segment
Inactive Subscriber Strategy
Handle subscribers who fall outside your base segment with these two strategies based on inactivity duration.
| Inactivity Period | Strategy | What to Do |
|---|---|---|
| 90-180 days without activity | Re-engagement campaign | Send a 3-email sequence: (1) "We miss you" with your best recent content, (2) "Last chance" with a compelling offer or update, (3) "Should we remove you?" with a clear opt-in button. Move re-engaged subscribers back to the base segment. |
| 180+ days without activity | Final email then remove | Send one final email asking if they want to stay subscribed. If no response within 7 days, remove them from your list. Keeping inactive subscribers hurts your deliverability for everyone else. |
The Deliverability Flywheel
Higher engagement leads to better ISP reputation, which leads to more inbox placement, which leads to more opens, which leads to even higher engagement. Removing inactive subscribers is not losing audience. It is protecting the inbox placement of every remaining subscriber. The flywheel only works when you maintain a clean, engaged list.