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A comment on Email Explained from First Principles. Parent comment
RFC 6854 updated the From field to allow an empty group construct (see https://explained-from-first-principles.com/email/#no-reply) but mainly for other reasons (see https://explained-from-first-principles.com/email/#email-add...).
DMARC authentication either rejects multiple addresses in the From field or authenticates them all and applies the most strict policy (see https://explained-from-first-principles.com/email/#domain-ba...).
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RFC 6854 updated the From field to allow an empty group construct (see https://explained-from-first-principles.com/email/#no-reply) but mainly for other reasons (see https://explained-from-first-principles.com/email/#email-add...).
DMARC authentication either rejects multiple addresses in the From field or authenticates them all and applies the most strict policy (see https://explained-from-first-principles.com/email/#domain-ba...).