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Learn about changes to the Yahoo DMARC policy and what they mean for email service providers sending to Yahoo Mail accounts.
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With the DMARC reject policy, Yahoo is saying “if you see mail from a Yahoo user, but we didn’t send it, please do not deliver it.”
In an attempt to stop fraudulent emails, Yahoo changed its DMARC authentication policy to reject emails that claim to come from yahoo.com but actually originate at non-Yahoo servers.
In an attempt to block email spoofing attacks on yahoo.com addresses, Yahoo began imposing a stricter email validation policy that unfortunately breaks the usual workflow on legitimate mailing lists. The problem is a new DMARC (Domain-based Message Authentication, Reporting and Conformance)...