How to Verify B2B Data Before Email Campaigns: Best Practices

Email verification is essential before launching any B2B campaign. Sending to invalid addresses damages sender reputation and wastes resources. This guide covers everything you need to know about verifying B2B contact data.

Why Verification Matters

• Protect sender reputation: High bounces hurt deliverability
• Avoid blacklists: ISPs flag high-bounce senders
• Save money: Don't pay to send to invalid emails
• Improve metrics: Accurate data = better analytics

Email Verification Tools

Top Verification Services

• NeverBounce: $0.003-0.008 per email
• ZeroBounce: $0.003-0.008 per email
• BriteVerify: $0.01 per email
• Hunter.io: Included with subscription

For bulk verification of 100K+ emails, expect to pay $300-$800.

Verification Status Types

• Valid: Safe to send - email exists and is deliverable
• Invalid: Do not send - mailbox doesn't exist
• Catch-all: Domain accepts all emails - moderate risk
• Unknown: Cannot verify - proceed with caution
• Disposable: Temporary email - skip

Verification Workflow

1. Export your list: Get emails from your database in CSV
2. Upload to verifier: Most accept bulk CSV uploads
3. Wait for results: Large lists may take hours
4. Download results: Get verified list with status codes
5. Filter by status: Keep only 'valid' and maybe 'catch-all'
6. Import to campaign tool: Send to verified list only

Expected Verification Rates

From quality B2B databases like HappierLeads:

• Valid: 65-75%
• Catch-all: 10-15%
• Invalid: 10-20%
• Unknown: 5-10%

When to Verify

• Before first campaign: Always verify new data
• Every 3-6 months: B2B data decays ~30% annually
• After import: Verify when adding to new campaigns
• After bounces: Re-verify if bounce rates increase

Get Verification-Ready Data

Ready to build your verified prospecting list? Buy our 175M Contact Database with email validation status included, then run through a verification service before campaigns.