Yahoo’s New DMARC Policy Destroys Every Mailing List across the World

Source: National Cyber Security – Produced By Gregory Evans

Yahoo! The one who enabled the HTTPS connections by default from the beginning of this year, the one who encrypts traffic moving between its data centers from 31st March, now has been accused of harming every Mailing List across the world.Experts from the Internet Engineering Council John R. Levine, specialized in email infrastructure and spam filtering claimed this in the post titled “Yahoo breaks every mailing list in the world including the IETF’s.” on Internet Engineering Task Force (IETF).Yahoo has established a new rule to automatically exclude Yahoo users from the mailing list, because Mailing List server does not comply with DMARC requirements and they strongly modifies each email.He talks about an “emerging e-mail security scheme” known as Domain-based Message Authentication, Reporting and Conformance (DMARC) that has been implemented by almost every largest email service providers, including Gmail, Hotmail, Comcast, and Yahoo.DMARC helps to reduce the potential for email-based abuse, such as phishing emails and email spoofing, by solving issues related to email authentication protocols. The receiver of the email performs email authentication by using the well-known Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) mechanisms.DMARC “lets a domain owner make assertions about the From: address, in particular that mail with […]

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