Protect Your Klaviyo
Deliverability Score
Clean Klaviyo segments and protect e-commerce email performance. ValidPeak validates subscriber lists before flows, campaigns, and win-back sequences — keeping your engagement signals healthy.
What you can do
Pre-flow validation
Validate contacts before they enter Klaviyo automated flows — welcome sequences, abandoned cart, browse abandonment. Invalid addresses in flows generate bounces that damage your domain reputation for every subsequent campaign.
Segment hygiene before campaigns
Run ValidPeak validation on high-value segments — VIP customers, win-back lists, promotional segments — before major campaign sends. Protects your engagement rates and Klaviyo sender score.
Import validation for new lists
Every time you import contacts from a lead magnet, event, or third-party source, run the list through ValidPeak before uploading to Klaviyo. Prevents bad addresses from inflating your contact count and suppressing your engagement signals.
How it works
Export a Klaviyo segment or list
In Klaviyo, navigate to Lists & Segments → select your list → Export. Choose CSV format.
Upload to ValidPeak Bulk Validation
Upload the CSV to ValidPeak. Each address is checked against 25+ verification layers including SMTP, disposable domain detection, and spam trap identification.
Download categorized results
ValidPeak returns a CSV with addresses tagged valid, risky, or invalid, plus the specific failure reason for each invalid address.
Re-import and suppress in Klaviyo
Import valid addresses back into Klaviyo. Add invalid addresses to your Klaviyo suppression list so they are excluded from all future sends and flows.
Frequently asked questions
Does ValidPeak integrate natively with Klaviyo?
The standard workflow is CSV-based: export a Klaviyo segment or full list, validate in ValidPeak Bulk Validation, and reimport only valid addresses. For automated real-time validation at the point of signup, use the ValidPeak API with a Zapier or Make automation triggered on new Klaviyo profile creation.
Klaviyo already has suppressions — do I still need to validate?
Klaviyo's suppression list catches unsubscribes, bounces, and spam complaints after they occur. ValidPeak prevents invalid and risky addresses from ever entering your list in the first place, stopping the bounce before it happens and protecting the engagement signals Klaviyo uses to calculate deliverability.
Can ValidPeak improve my Klaviyo deliverability score?
Yes. Klaviyo's inbox placement and deliverability ratings are influenced by engagement rates (open rate, click rate) and bounce rate. Removing invalid addresses lowers bounce rate and raises engagement rate simultaneously, both of which directly improve Klaviyo's deliverability signals.
How should I handle catch-all domains in Klaviyo?
ValidPeak flags catch-all domains as 'risky' — they accept all email at the domain level but individual mailboxes may not exist. For high-value lists, segment risky addresses into a separate Klaviyo list and send a lower-volume re-engagement campaign before deciding whether to keep or suppress them.
Clean your Klaviyo list — try ValidPeak free
200 free validations per month. No credit card required.