Guides
Email health, explained.
Practical guides on verification, deliverability, and continuous monitoring — concrete numbers, no fluff.
6 min read
What Is Email Verification? A Practical Guide
How email verification works, what each check catches, and why one-shot cleaning isn't enough for lists that decay over time.
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5 min read
Catch-All Emails: What They Are and How to Handle Them
Why verifiers return 'risky' for catch-all domains, how common they are, and a practical strategy for sending to them safely.
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5 min read
What's an Acceptable Email Bounce Rate?
Hard vs soft bounces, the thresholds that matter, how providers punish high-bounce senders, and how to stay under the line.
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5 min read
Detecting Disposable and Temporary Emails at Signup
Why burner domains poison signup funnels, how detection works, and how to gate signups on isDisposable with one API call.
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