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.

Content Management System
Email Hosting Providers

MailgunMailgun

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Mailgun is a set of APIs that allow you to send, receive, track and store email effortlessly.

Transactional Email

MimecastMimecast

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Cloud services for Microsoft Exchange designed to remove risk, lower costs and help businesses make sense of their email data.

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.