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g_dmarc_use "true"

This setting enables the use of dmarc dns records to establish if DKIM signatures should exist for a particular domain, and what policy should be applied if the DKIM tests fails. This allows surgemail to safely enforce DKIM and reject more types of forgery/spam.

See https://surgemail.com/knowledge-base/sending-email-to-avoid-spam-filters-best-practices/

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