Can you trust an email’s sender adress? Generally no, but you can with DMARC.
The Halon SMTP software features DMARC (Domain-based Message Authentication, Reporting and Conformance); the first widely deployed technology that can make the “From” header trustworthy.
Building upon our DKIM library, we were one of the first e-mail gateway products to incorporate DMARC validation. All users should consider adding the “Verify sender” block to their inbound DATA flow. That’s really that simple, and it will block messages with From header addresses that fakes DMARC-protected domains such as “paypal.com” and “linkedin.com”. DMARC is already widely deployed by domains that are being abused by scammers, and more companies join in every day.
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Halon is already used and appreciated by thousands of hosting and email service providers worldwide.