Blog
Developer tutorials, tips, and product updates.
Validation
SMTP Verification: The Gold Standard for Email Deliverability
Learn how SMTP mailbox probing works and why it's more reliable than MX-only checks.
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Validation
Detecting Disposable Email Addresses at Scale
Block throwaway signups by identifying 500+ disposable email providers programmatically.
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Intelligence
Catch-All Domains: What They Are and Why They Matter
Catch-all domains accept every address — here's how to detect them and what it means for validation.
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Header Analysis
Email Header Forensics: Tracing Spoofing and Routing
Parse raw email headers to trace routing hops, authentication results, and spoofing indicators.
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Intelligence
Gmail Address Normalization for User Deduplication
Gmail ignores dots and plus-aliases — learn how to normalize addresses to prevent duplicate signups.
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