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Diving into DMARC: Can it really end spam, or at least phishing?

ExtremeTech: As the publisher of a photography newsletter, and the recipient of seemingly endless spam messages, I’ve got more than one reason to be interested in any new spam-fighting technique. After the fairly disappointing results from initial industry efforts — Sender Policy Framework (SPF) and Domain Keys Identified Mail (DKIM), the announcement of DMARC (Domain-based Message Authentication, Reporting, and Conformance) has rightfully been greeted with skepticism. Aside from glowing headlines repeating promises from the specifications promoters, there hasn’t been much real information reported on it. So I plunged into researching and implementing it, so I could pass along how it works and what it can and can’t do for you.

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