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Stop emailing bad customers: Blockify now syncs to Klaviyo

November 12, 2025

We have some electrifying news for all Blockify users and fellow marketing strategists!

We’re thrilled to announce that Blockify now seamlessly integrates with Klaviyo, the leading email marketing platform for e-commerce. This integration is designed to put an end to one of the most common and costly marketing headaches: wasting time and resources on profiles associated with risky or fraudulent orders.

Blockify x Klavio

Stop Wasting Your Email Quota

Every time Blockify flags an order as high-risk or medium-risk, that order (and the customer profile associated with it) can now be automatically synced to Klaviyo and tagged.

No more manually exporting lists, building complex segments, or inadvertently sending your best promotions to known abusers or low-value customers. You can finally ensure your email marketing efforts are focused squarely on profiles that drive value.

The Power of Automated Segmentation

This automatic, two-way sync transforms your marketing capabilities by giving you granular control based on fraud risk data.

This means you can immediately:

  • Segment Risky or Low-Value Customers: Use the tags synced from Blockify (e.g., blockify_high_risk, blockify_medium_risk) to instantly build dynamic segments inside Klaviyo.
  • Send Targeted Flows: Set up specialized flows for profiles based on their risk level. This could include warning emails, “please confirm info” requests for medium-risk orders, review/feedback requests, or special conditions (like excluding them from free shipping offers).
  • Exclude Abusers and Non-Valuable Profiles: Easily exclude these segments from your main campaign sends – saving your valuable email quota and protecting your sender reputation.
  • Save Time & Stay Synchronized: Keep your marketing and fraud protection systems perfectly aligned, instead of managing two separate, disconnected systems.

How to Turn It On (A Few Clicks)

Getting started is fast and simple. You can be syncing data in minutes:

Step 1: Enable the integration

In your Shopify admin, open the Blockify app and navigate to the Integrations tab.

Enable the integration Klavio in Blockify

Install Klaviyo by clicking the “Install” button.

install Klaviyo by clicking the “Install” button.

Connect your Klaviyo account by entering your Private Key then click the Connect button

Enable the integration Klavio in Blockify - Connect button

Step 2: Configure sync settings

Under “Sync Settings,” turn on “Automatically sync risky orders.” (When enabled, all risky orders detected by Blockify will be automatically synced to Klaviyo without manual intervention).

Enable the integration Klavio in Blockify - Configure sync settings

Once enabled, the “Conditions & Tags” section below will be automatically activated for you to customize the sync rules.

Step 3: Set up conditions and tags

Choose which orders to sync (High-risk, Medium-risk, or both).

Customize your tag names (e.g., blockify_high_risk) and use these tags to build your powerful segments and flows inside Klaviyo.

For a detailed step-by-step guide and some pro tips to get you started, check out our official documentation here.

Connect Klaviyo Today

This is more than just a convenience; it’s a strategic tool to improve your ROI and clean up your customer data.

Ready to start communicating smarter? Connect Klaviyo now and clean up your marketing efforts.

If you’d like help designing specific segments or flows – for example, a “risky customer check,” a “do not email” segment, or a “win-back but with limits” flow – just reply to this post or contact our support team, and we will walk you through the process.

 

 

 

 

Jennifer Tran AUTHOR

As the Co-founder & CPO of Blockify, I'm obsessed with solving this pain point. We build intelligent security tools that don't just block bad actors - they protect and unlock revenue. By automating fraud prevention with precision, we help merchants stop financial leaks, eliminate the cost of manual reviews, and reduce the fear that leads to rejecting good customers.