Securify
Securify for Klaviyo
Email validation powered by Securify
Securify · Klaviyo App Marketplace

Clean Klaviyo lists.
Protect your sender reputation.

One-click email validation for every list and segment in your Klaviyo account. Find risky and undeliverable addresses before they hurt deliverability — and write the verdict back to every profile so your flows stay clean.

Validate any list in < 1 min / 1kWrites results to profile propertiesNo CSVs. No exports.
Install on Klaviyo →See how it works

Sign in with your email (no password), then connect Klaviyo. About two minutes.

securify-klaviyo · Newsletter Master
Validation result
Newsletter Master
✓ Validated · just now
48,210
checked
Deliverable37,604
Risky6,267
Undeliverable4,339
Written back to securify_status on every Klaviyo profile.

How it works

  1. 1

    Pick a list

    Choose any Klaviyo list or segment. Nothing outside the one you select is ever read.

  2. 2

    We validate

    Each email runs through a disposable-domain check and a live SMTP probe. Clean, risky, disposable, or undeliverable.

  3. 3

    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

PropertyExample
securify_status
enum
deliverable
securify_score
integer 0–100
97
securify_validated_at
ISO datetime
2026-04-29T14:30:00Z
securify_list_batch
string
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.

Stop sending to inboxes that don't exist.

Free to install. OAuth-only. We never read your campaigns, flows, or SMS content — only profiles, lists, and segments. You'll sign in with your Shopify store first, then connect Klaviyo.

Install on Klaviyo →