Web Reference: By default, Postfix has a moderately restrictive approach to mail relaying. Postfix forwards mail only from clients in trusted networks, from clients that have authenticated with SASL, or to domains that are configured as authorized relay destinations. Oct 17, 2017 · By default, my Postfix allows relay emails sent to my domain (domain1.com) or only for password auth clients or for 'myhostname' addresses. This is a regular situation for most mail servers. Dec 21, 2023 · To correct the "Relay Access Denied" error in Postfix, you need to configure your Postfix server to allow legitimate users or hosts to relay email through it while rejecting unauthorized relay attempts.
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