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Email Verification Blog
Practical guides on deliverability, list hygiene, bounce rates, and the technical side of email verification.
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How to Reduce Your Email Bounce Rate: A Practical Guide
A high email bounce rate damages your sender reputation and reduces deliverability. Here's what causes bounces and seven proven ways to keep your rate below 2%.
Catch-All Email Addresses: What They Are and How to Handle Them
Catch-all email addresses accept every message sent to a domain, making them impossible to verify by SMTP alone. Here's what they mean for your list and what to do with them.
Disposable Email Addresses: What They Are and How to Handle Them
Disposable email addresses let users sign up without giving their real inbox. Here's why they end up on your list, what problems they cause, and how to keep them out.
How SMTP Email Verification Works
SMTP email verification checks whether a mailbox actually exists by simulating a delivery conversation with the mail server — without sending an email. Here's the technical detail.