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Mail Ward is built to prevent bounces, spam complaints, and unnecessary unsubscribes by acting before a send, not after the damage is done. It combines webhook-driven screening, automated suppression, and deliverability scoring you can use for targeting. It is continuous protection, not one-off list cleaning.
Stop bad sends upstream to preserve domain trust and inbox placement.
Webhook-based decisions made the moment a contact enters your flow.
Use deliverability scores and statuses to mail the right audience.
Unlike batch list cleaning services, Mail Ward evaluates every email address in real-time as it enters your flows. This means bad addresses are caught and suppressed immediately, preventing them from ever reaching your email service provider.
Every email is validated the moment it hits your webhook, with results returned in milliseconds.
Your flows continue at full speed while we protect your reputation in the background.
Our validation engine combines multiple verification methods to achieve industry-leading accuracy rates. We check syntax, domain validity, mailbox existence, and deliverability risk factors.
Industry-leading validation accuracy
Average validation response time
Continuous monitoring and protection
Every screening and suppression is rolled up into your analytics, so you can see exactly what Mail Ward caught and how your list quality is trending over time.
Set your preferences once, and Mail Ward automatically suppresses addresses based on your criteria. No manual intervention required - just configure your thresholds and let us protect your reputation.
You maintain full control over your suppression settings. Choose which categories get auto-suppressed, set a risky-score threshold, and monitor results, all from one preferences screen.
Mail Ward sends detailed events to your platform with comprehensive data about each email validation. Use this data for segmentation, analytics, and advanced targeting strategies.
Triggered for every email validation with detailed deliverability data.
Triggered when an email is automatically suppressed with reason details.
Use Mail Ward data to create powerful segments that improve engagement and deliverability. Here are some examples of segments you can build.
Mail Ward offers unique advantages over traditional list cleaning services and other validation tools.
Unlike batch cleaning services, we validate every email in real-time as it enters your flows, preventing bad addresses from ever reaching your ESP.
Connects to Klaviyo and other platforms through webhooks, not just API calls or file uploads.
Always-on monitoring and protection, not just one-time cleaning. Your lists stay healthy automatically.
Getting started with Mail Ward is simple and takes just a few minutes. Our webhook-based approach means no complex integrations or API management. Copy the destination URL and your X-User-ID into any Klaviyo flow and you're live.
Batch jobs are static and can't prevent new bad addresses from slipping in. Mail Ward evaluates and suppresses in real time and continually updates profiles via events.
Preferences are configurable. Start with conservative thresholds; observe metrics; then tighten rules as confidence grows.
You'll see immediate improvements in bounce rates and deliverability metrics within the first week. Full reputation benefits typically manifest within 30-60 days of consistent use.
Ready to protect your reputation?
Get Started