ListDefender doesn't just scan your list — it protects it, continuously.
Unlike traditional one-time scrubbing tools, ListDefender uses proprietary Smart Scans to intelligently monitor and maintain your list’s health based on subscriber validity, quality, and engagement.
Here’s how our Smart Scan system works to safeguard your email deliverability — automatically:
Initial Full-List Scan
A comprehensive analysis of your entire email list for validity, quality signals, and engagement behavior — right from the start.
Instant Scans for New Subscribers
Every new subscriber is scanned in real-time to detect fake, invalid, or risky addresses before they can harm your sender reputation.
Weekly Engagement Audits
We re-check engagement across your entire valid list weekly — helping you spot inactive users before they impact deliverability.
Optional Daily Engagement Tracking (for new subs)
Stay ahead of the curve by monitoring engagement patterns from new subscribers daily — ideal for fast-moving campaigns or high-volume lists.
Frequent Risk-Based Scans
Subscribers with warning signs — like “mailbox full” or “temporary bounce” — are automatically rescanned daily or multiple times a week. As soon as they recover, you’ll know.
Monthly Full-List Health Check
A complete re-evaluation of your list each month to ensure your entire database remains clean, engaged, and safe.