Loading...
Mail Ward plugs directly into Klaviyo to validate emails in real time inside your flows. The result: cleaner lists, a protected sender reputation, and better deliverability without manual intervention.
Validate emails the moment profiles enter your flows
Suppress risky addresses before they reach your email service
Track list health and deliverability metrics over time
Drop a Mail Ward action directly into any Klaviyo flow to validate addresses the moment a profile enters. We classify each contact's deliverability (undeliverable, risky, disposable, role-based, or no-reply) and send that status back to Klaviyo so bad addresses never make it into send-eligible segments. Protect your domain reputation and reduce bounces without adding manual review steps.
Stop hand-scrubbing new signups. With Mail Ward preferences you can automatically suppress disposable and throwaway domains, flag role accounts (like support@), and catch undeliverable or risky addresses as soon as they hit Klaviyo, whether they arrive from forms, pop-ups, API imports, or CSV uploads. Scale acquisition while keeping list quality high and deliverability risk low.
Mail Ward returns event properties you can use in Klaviyo: deliverability status, a 0 to 100 quality score, and disposable, role-based, and free-domain flags. Combine those with Klaviyo's analytics to build segments like "recent purchasers with valid emails" or "high-intent leads, not disposable," track list hygiene over time, and report on conversion, bounce rate, and revenue by quality tier.
Mail Ward processes email validation in real time with instant results. Events are sent immediately as profiles enter your flows, ensuring your campaigns never wait for validation. Our optimized infrastructure delivers sub-second response times, so your Klaviyo flows maintain their speed while gaining powerful email quality protection.
Getting started with Mail Ward in Klaviyo is simple and takes just a few minutes.
Link your Mail Ward account with Klaviyo using secure OAuth authentication
Drop the Mail Ward validation action into your existing Klaviyo flows
Set your validation preferences for the statuses you want auto-suppressed
Track validation results and list quality improvements in your Klaviyo analytics
Ready to clean up your Klaviyo lists?
Get Started