Every plan · Dynamic segments · Deliverability-linked

Send to the Right Contacts
at the Right Time

Broadcasting the same email to your entire list is the fastest way to damage your sender reputation. Contact segmentation lets you send relevant content to engaged contacts — improving every metric from open rates to inbox placement.

Start free — segmentation includedDeliverability tools

Quick Answer

Contact segmentation divides an email list into smaller groups based on shared characteristics — engagement history, lifecycle stage, acquisition source or custom attributes. Segmented sends consistently outperform broadcast sends: higher open rates, lower complaint rates, fewer unsubscribes and better inbox placement because inbox providers reward domains whose mail gets opened and clicked.

Key Takeaways

  • Engagement segmentation (by last open or click date) is the single most impactful strategy for protecting sender reputation
  • Sending to inactive contacts — people who have not opened in 90+ days — lowers domain engagement rates and damages inbox placement
  • Dynamic segments update automatically as contact data changes; no manual list management needed
  • Re-permission campaigns should precede suppression: send one email asking cold contacts to confirm, then suppress non-responders
  • A list of 5,000 engaged contacts will outperform a list of 50,000 unresponsive contacts on every deliverability metric

Segmentation Is a Deliverability Tool

↑

Open rate

Higher — engaged contacts are more likely to open

↑

Click rate

Higher — relevant content drives more clicks

↓

Spam complaint rate

Lower — relevant email is not reported as spam

↓

Hard bounce rate

Lower — active contacts have valid inboxes

↓

Unsubscribe rate

Lower — relevant content keeps subscribers interested

↑

Inbox placement

Higher — Gmail/Outlook reward high engagement domains

Six Ways to Segment Your Contacts

Combine multiple filters with AND/OR logic. Segments update dynamically as contact data changes.

📊

Engagement segmentation

Group contacts by recency and frequency of email interaction.

Opened in last 30 days
Clicked in last 90 days
No opens in 180+ days
Never opened

Protect deliverability. Suppress inactive contacts before they drag down your engagement rate.

🔄

Lifecycle segmentation

Group contacts by where they are in their relationship with your business.

New subscriber (< 30 days)
Active customer
Lapsed (90+ days no purchase)
Churned

Send stage-appropriate content. Onboard new subscribers. Win back lapsed customers.

🎯

Behavioural segmentation

Group contacts by actions they have (or have not) taken.

Clicked product category X
Visited pricing page
Opened but never clicked
Referred a contact

Send content relevant to demonstrated interest. Improve click rates and conversions.

📥

Acquisition source segmentation

Group contacts by where and how they joined your list.

Web sign-up form
Event registration
API import
Manual import

Match content and consent scope to how the contact joined. Avoid mismatched messaging.

🏷️

Custom attributes segmentation

Group contacts by any custom field you define — industry, role, plan tier, location.

Plan: Free
Industry: E-commerce
Country: DE
Account age: > 1 year

Highly targeted sends. Product updates relevant only to specific plan tiers or regions.

🛡️

Deliverability segmentation

Group contacts by their deliverability-relevant status.

Hard bounced
Soft bounced 3+
Spam complaint
Suppressed

Visibility into list health. Never accidentally send to suppressed addresses.

Start with Engagement Segmentation

If you implement one segmentation strategy, make it engagement-based. It directly protects your sender reputation and inbox placement.

Active

Opened or clicked in the last 30 days

Your primary send segment. These contacts want to hear from you — send at full frequency.

Warm

Opened or clicked in the last 90 days, not in last 30

Send at reduced frequency. Include content worth opening to re-activate.

Cold

No opens or clicks in 90–180 days

Send a single re-engagement email. If no response within 14 days, move to suppression queue.

Inactive

No opens or clicks in 180+ days

Send a final re-permission email. No click to confirm = suppress. A clean list performs better than a large one.

Contact Segmentation FAQ

What is contact segmentation in email marketing?+
Contact segmentation is the practice of dividing your email list into smaller groups based on shared characteristics — engagement history, signup source, lifecycle stage, purchase behaviour, demographics or custom attributes. Segmented sends outperform broadcast sends on every measurable metric: higher open rates, higher click rates, lower unsubscribes and better deliverability.
How does segmentation improve email deliverability?+
Inbox providers like Gmail and Outlook use engagement signals to judge whether your email is wanted. Sending to inactive contacts drives down your engagement rate and signals that your mail is unwanted. Segmenting to send only to engaged contacts — those who opened or clicked recently — keeps your engagement rate high, which protects inbox placement for your entire sending domain.
What segmentation filters does NexusProMail support?+
NexusProMail supports segmentation by: last open date, last click date, total opens, signup source, contact tags, custom attributes, bounce status, complaint status, subscription status and list membership. Segments can combine multiple filters with AND/OR logic.
What is an engagement segment and how do I use it?+
An engagement segment groups contacts by how recently and frequently they have interacted with your emails. A typical setup: Active (opened in last 30 days), Warm (opened in last 90 days), Cold (no opens in 90–180 days), Inactive (no opens in 180+ days). Use this to send re-permission campaigns to cold/inactive contacts before suppressing them, and to protect deliverability by prioritising active segments for important sends.
What is lifecycle segmentation?+
Lifecycle segmentation groups contacts by where they are in their relationship with your business: new subscribers (first 30 days), active customers, lapsed customers, churned customers. Each stage warrants different content and send frequency. New subscribers benefit from onboarding sequences; lapsed customers from re-engagement campaigns; active customers from product updates and cross-sells.
How many segments can I create in NexusProMail?+
There is no hard limit on the number of segments you can create. Segments are dynamic — they update automatically as contact data changes. A contact who was in your "cold" segment automatically moves to "active" when they open an email.
Does segmentation affect sender reputation?+
Yes, positively. Segmenting to remove inactive contacts from your sends is one of the most effective ways to protect and improve your sender reputation. Inbox providers see higher engagement rates on your sends, which signals that your mail is wanted. This improves inbox placement rates across your entire sending domain.
Should I suppress inactive contacts or try to re-engage them first?+
Try re-engagement first. Send a single re-permission email to contacts who have not engaged in 6–12 months. Clearly state what you send and ask them to confirm they still want to receive it. Those who click the confirmation link move back to your active segment. Those who do not respond should be suppressed. A smaller, engaged list always outperforms a large unresponsive one on every deliverability and performance metric.

Segment smarter. Protect your reputation.

Engagement, lifecycle and behavioural segmentation built into every NexusProMail account.

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Also read: Email deliverability · Domain warming · GDPR compliance · Privacy-first email