How to Segment Your Email List for Better Results
Sending the same email to everyone kills open rates. Email segmentation lets you send the right message to the right person — and it works.
2 min read · Updated 2026-04-15
Short answer
Segmentation means dividing your email list into smaller groups so you can send more relevant content. Segmented campaigns get 14% higher open rates and 100% more clicks than non-segmented ones (Mailchimp data).
Why segmentation matters
If you sell dog products, sending a "Best cat toys" email to dog owners annoys them and hurts your open rates. Segmentation ensures people only get emails relevant to them — so they actually open, read, and buy.
Common ways to segment
By signup source
- Signed up from your blog → send content-heavy emails
- Signed up from a sale page → send promotions and product updates
By purchase behavior
- First-time buyers → onboarding sequence
- Repeat buyers → loyalty rewards, upsells
- Lapsed customers (no purchase in 90+ days) → win-back campaign
By interest or topic
Ask in the welcome email: "What are you most interested in?" Use tags based on the answer.
By engagement level
- High openers (opened last 5 emails) → promote your best offer
- Low openers (haven't opened in 60 days) → re-engagement campaign, then unsubscribe if no response
By location
Useful for local businesses running events or region-specific promotions.
How to set it up
Mailchimp: Use Tags and Groups. Apply tags based on signup forms, purchase actions, or manual assignment.
MailerLite: Use Segments (automatic, rule-based) and Groups (manual). Segments auto-update — e.g., "anyone who opened last 3 campaigns."
Klaviyo: Best for eCommerce segmentation. Automatically segments based on Shopify/WooCommerce purchase data.
Start simple
You don't need 20 segments on day one. Start with two:
- Buyers vs non-buyers
- Engaged (opened in last 30 days) vs unengaged
These two segments alone will dramatically improve your results.