Have I Been PwnedHave I Been Pwned

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Domain ownership verification for haveibeenpwned provides site owners with access to reports of email addresses associated with there domain found in data breaches.

Email Hosting Providers

Google Postini ServicesGoogle Postini Services

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Email network security and compliant round the clock - in the cloud, without installing costly hardware or infrastructure.

Business Email Hosting

SPFSPF

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The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery.