---
title: Email Verification via Xero Bounce
type: knowledge
created: '2026-04-05'
updated: '2026-04-05'
source_docs:
- raw/2025-11-04-sales-standup-98998334.md
tags:
- email-verification
- xero-bounce
- clay
- email-marketing
- data-quality
- sender-reputation
layer: 2
client_source: null
industry_context: null
transferable: true
---

# Email Verification via Xero Bounce

Before sending any outreach, all email addresses should be verified to prevent bounces and protect sender reputation. Unverified lists — especially those built from old imports or third-party sources — carry significant risk of hard bounces, which can damage deliverability across all campaigns.

## Why This Matters

Sending to invalid or stale email addresses harms sender reputation with email providers, increasing the likelihood that future messages land in spam. A large database with poor data hygiene (e.g., 40k+ contacts accumulated over years from various list imports) is particularly vulnerable. Verification should be treated as a mandatory gate before any contact enters an outreach sequence.

## Two-Track Verification Process

The approach differs depending on whether contacts are new or already exist in the CRM.

### New Contacts (Pre-Import)

Use **Clay's built-in email verification tools** during the enrichment and import workflow. Before a new contact is written to HubSpot, Clay can validate the address and flag invalid or risky emails for exclusion.

- Verify emails in Clay as part of the standard import pipeline
- Do not import contacts with unverified or failed email addresses

### Existing Contacts (Already in CRM)

For contacts already in HubSpot, export the full contact list and run it through **Xero Bounce**.

- Export all contacts from HubSpot
- Submit the list to Xero Bounce for bulk verification
- Remove or suppress contacts whose addresses fail verification before including them in any campaign

## Integration with CRM Cleanup

Email verification is one step in a broader [[wiki/knowledge/crm/hubspot-data-cleanup-strategy|HubSpot data cleanup workflow]]. In the context of a large, stale database, verification should run in parallel with data enrichment (e.g., correcting industry categorization, updating contact details). The recommended sequence:

1. Export full HubSpot contact list
2. Enrich data (industry, title, company) via Clay or similar tool
3. Verify all email addresses via Xero Bounce
4. Re-import only clean, verified contacts
5. Apply appropriate [[wiki/knowledge/crm/hubspot-lifecycle-stages|lifecycle stage]] tags to re-imported contacts

## Tools

| Tool | Use Case |
|---|---|
| **Clay** | Verification for new contacts during enrichment/import |
| **Xero Bounce** | Bulk verification of existing CRM contacts |

## Evidence

This process was defined during a sales ops standup between Mark Hope and Jacob Jones while planning a cleanup of a 40k+ contact HubSpot database. The database had accumulated stale contacts from years of ad-hoc list imports, with no prior verification pass. See [[wiki/meetings/2026-04-05-sales-standup-hubspot-data-cleanup|Sales Standup: HubSpot Data Cleanup and CRM Strategy]] for full context.