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The core value of pairing Mail Ward with Klaviyo is twofold: you get enriched deliverability data on every contact Mail Ward screens, and you can automatically suppress contacts whose deliverability score falls below your threshold, before they ever affect a send.
Data that is received from Klaviyo is the email address but this is never stored in Mail Ward. Mail Ward will send a
In Klaviyo you have the ability to then segment customers or trigger further flows as well as create dynamic email content with the data from Mail Ward.
We use webhooks from Klaviyo to receive email addresses in real-time. Our system then processes each email address with our internal validation tool and sends responses back to Klaviyo immediately with no delays, ensuring your flows remain responsive and efficient.
Within the Mail Ward dashboard, select
Add an empty webhook action to your desired flow. No settings required.
Choose either the manual or the automatic setup guide on the dashboard.
Visit the Preferences section to decide how screened profiles are handled.
Mail Ward sends two events to Klaviyo:
Here's the full chain reaction in a Klaviyo profile's activity log: a contact joins from a Facebook lead ad, enters a flow, and is picked up by the webhook and screened by Mail Ward. Because the account's preferences flagged it as a spam profile, it is suppressed automatically. The timestamps show it all happens instantly.
This event is tracked whenever an email address is screened through Mail Ward. The event includes deliverability and quality insights about the address so you can use this data to automatically suppress risky or invalid contacts, or personalize your sending strategy based on deliverability health.
You can filter and target Screened by Mail Ward events based on the following properties:
| Property | Description |
|---|---|
| Auto Suppressed | Indicates whether the contact was automatically suppressed after screening. |
| Deliverability Status | The result of Mail Ward's verification for this address. Possible values include deliverable, undeliverable, or risky. |
| Free Domain | Shows whether the email uses a free email service provider (e.g., Gmail, Yahoo, Outlook). |
| Domain | The domain portion of the email address. |
| Mailbox Full | Identifies if the mailbox was reported as full, which may cause temporary bounces. |
| Suspected Role Domain | Indicates whether the domain is associated with a group or role-based address (e.g., support@, admin@). |
| Score | A numeric quality score (0 to 100) representing how likely the address is to be valid and receive emails successfully. |
| No Reply Address | Flags addresses that appear to be "no-reply" inboxes, which typically shouldn't receive messages. |
| Disposable Domain | Indicates if the email comes from a temporary or disposable email provider. |
| Reason | Provides a short description explaining the screening outcome. |
| The full email address that was screened. |
This event is triggered when a contact is automatically suppressed by Mail Ward because their email quality score does not meet the minimum threshold set in your suppression preferences. The event includes details about why the suppression occurred and when the request was sent to Klaviyo. You can use this data to track suppression activity, audit deliverability decisions, or trigger workflows when a contact becomes suppressed.
You can filter and target Suppressed by Mail Ward events based on the following properties:
| Property | Description |
|---|---|
| Suppression Reason | The reason the contact was suppressed, typically based on the deliverability status or validation result. |
| Score | The email's quality score (0 to 100) at the time of suppression. |
| Suppression Request Timestamp | The date and time Mail Ward sent the suppression request to Klaviyo. |
Use the Score property to build dynamic segments that target only your most deliverable and engaged contacts. For example, you might create a segment for contacts with a score of 80 or higher to ensure your campaigns go to valid, high-quality email addresses. You can also exclude lower-scoring contacts (e.g., below 60) from campaigns to reduce bounces and improve inbox placement.
For addresses that fall into a "risky" score range, you can trigger an automated email confirmation or double opt-in flow. This allows those contacts to verify their address and move back into your engaged audience if valid, while keeping your main list clean and compliant.
Track changes in deliverability trends by analyzing Mail Ward events like Screened by Mail Ward and Suppressed by Mail Ward. This helps you understand how many contacts are being screened, what percentage are risky or undeliverable, and how your suppression thresholds affect list quality. The example below shows a real Klaviyo sender score climbing steadily after auto-suppression was switched on.
Use Mail Ward's suppression data to automatically manage who can receive emails from your Klaviyo account. Contacts that no longer meet your quality standards are suppressed in real time, preventing accidental sends to undeliverable addresses and protecting your sending reputation.
Adjust messaging for lower-score contacts, such as using lighter-weight transactional templates or alternative channels like SMS, to maintain engagement while minimizing bounce risk.
Need help getting started? Connect your Klaviyo account from your dashboard.
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