Email Verification Audit Trail: Connect Results to Decisions

Record email verification results, address versions and workflow decisions. Preserve useful history while limiting sensitive data in operational logs.

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Email Marketing Strategy

What Is a Spam Trap? Types, Warning Signs, and Safer List Practices

Understand spam-trap types, verification limits, and practical steps to investigate list sources, preserve suppressions, and reduce repeat incidents.

Email Marketing Strategy

Hard Bounce vs. Soft Bounce: The Definitive Guide for Marketers

Confused by bounce codes? A Hard Bounce is a permanent failure, while a Soft Bounce is a temporary delay—but handling them incorrectly can ruin your sender reputation. Learn the critical differences, how to read SMTP error codes, and apply our "3-Strike Rule" to manage your list hygiene like a pro.

Email Marketing Strategy

Google Bulk Sender Guidelines 2026: The Complete Compliance Checklist

Google's 2026 bulk sender guidelines require SPF, DKIM, DMARC, and a spam rate below 0.08%. Here's the complete checklist, plus the error codes Gmail returns when compliance fails.

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CUSTOM PLANS FOR HIGH-VOLUME TEAMS

Verifying more than 500,000 emails? Let’s build the right plan.

Tell us your volume and workflow. We’ll help you define the right capacity, pricing and support.

Request a custom plan

For teams verifying 500,000+ emails per month.