Find fake emails hiding in your Klaviyo lists.
Securify validates every email address on a Klaviyo list or segment — SMTP-probed, disposable-checked, and scored — then writes the verdict back as profile properties you can segment on in seconds. Stop sending to inboxes that don't exist.
Connect your Klaviyo account
OAuth 2.0 with PKCE. We request read + write access only on profiles, events, lists, and segments — nothing else.
- Free to install. No credit card.
- OAuth tokens are AES-256-GCM encrypted at rest.
- No access to campaigns, flows, or SMS content.
- One click to uninstall from the Klaviyo portal.
How it works
Pick a list
Choose any Klaviyo list or segment. Nothing outside the one you select is ever read.
We validate
Each email runs through a disposable-domain check and a live SMTP probe. Clean, risky, disposable, or undeliverable.
Results land on your profiles
Verdicts are written back as profile properties within seconds — segment on them immediately to suppress fakes.
Playbooks
See all →What lands on your Klaviyo profiles
| Property | Example |
|---|---|
securify_statusenum | deliverable |
securify_scoreinteger 0–100 | 97 |
securify_validated_atISO datetime | 2026-04-29T14:30:00Z |
securify_list_batchstring | newsletter-master/2026-04-29 |
Plus two branded Klaviyo events — securify.email_validated (one per profile) and securify.list_validated (one per batch) — visible in your Klaviyo Metrics with the Securify logo.