VeriMails + Klaviyo

Verify Klaviyo profiles before sending campaigns. Protect your sender reputation and improve deliverability with real-time SMTP verification.

Get Started Free API Documentation
100 free verifications on signup. No credit card required.

Why Verify Emails in Klaviyo?

Protect sender reputation

Email marketing platforms suspend accounts when bounce rates exceed 2-5%. Verifying your Klaviyo lists before sending prevents hard bounces that damage your sender score and trigger account reviews.

Improve open and click rates

Invalid emails drag down your engagement metrics. Removing undeliverable addresses from Klaviyo means your open and click rates reflect actual subscriber interest, giving you accurate campaign performance data.

Reduce wasted spend

Most email marketing platforms charge by subscriber count. Every invalid email in your Klaviyo account is money wasted on an address that will never open, click, or convert.

How to Connect VeriMails + Klaviyo

Choose the integration method that fits your workflow. All methods give you the same verification accuracy.

Recommended

Connect via VeriMails API

1
Get your API key

Sign up at verimails.com and copy your API key from the dashboard.

2
Export contacts from Klaviyo

Export your Klaviyo contact list as a CSV file or use the Klaviyo API.

3
Verify and re-import

Upload the CSV to VeriMails for bulk verification, or use the API for real-time checks. Import verified contacts back to Klaviyo.

No-Code Option

Connect via Zapier

1
Create a Zap

Set Klaviyo as the trigger app and VeriMails as the action app in Zapier.

2
Map the email field

Connect the email field from Klaviyo to the VeriMails verification action.

3
Route by result

Use Zapier filters to route verified, invalid, and risky emails to different actions in Klaviyo or other tools.

Manual

CSV Export / Import

1
Export from Klaviyo

Download your contacts or subscribers as a CSV file from Klaviyo.

2
Upload to VeriMails

Upload the CSV to VeriMails. Bulk verification processes thousands of emails in minutes.

3
Re-import clean list

Download the verified results and import the clean list back into Klaviyo. Remove or tag invalid contacts.

Benefits of Verifying Klaviyo Emails

Lower bounce rates

Keep hard bounce rates below 2% to maintain good standing with your email platform and inbox providers.

Higher engagement

Clean lists mean real subscribers, which means higher open rates, click rates, and conversion rates.

Save on platform costs

Stop paying for invalid subscribers. Every cleaned email reduces your monthly bill from your email platform.

Spam trap protection

VeriMails detects known spam traps that can get your domain blacklisted if you send to them.

Frequently Asked Questions

VeriMails connects to Klaviyo via API integration, Zapier automation, or CSV export/import. A native direct integration is on our roadmap. In the meantime, the API and Zapier methods work seamlessly for both real-time and bulk verification.
VeriMails offers 100 free verification credits on signup with no credit card required. Paid plans start at $0.0019 per email. You can verify your entire Klaviyo list affordably regardless of size.
VeriMails uses real SMTP verification to check deliverability of every email address. For catch-all domains common in B2B contacts, we provide probability scores from 0 to 1 so you can make informed decisions about Klaviyo contacts.
Yes. Using Zapier or Make, you can set up automations that verify every new contact added to Klaviyo in real time. Alternatively, use the VeriMails API for direct programmatic integration.
VeriMails only identifies which emails are invalid, risky, or undeliverable. You decide which contacts to remove from Klaviyo. We recommend removing hard invalids and flagging risky addresses for review.

Start Verifying Klaviyo Emails Today

Join thousands of teams who trust VeriMails for accurate, fast email verification.

Get Started Free
100 free verifications on signup. No credit card required.