Oracle Cloud Infrastructure - "471 Authorization Failed: Envelope From Address <opc@localhost.test.vcn1.oraclevcn.com> Not authorized (in reply to MAIL FROM command)" (Doc ID 2563357.1)

Last updated on AUGUST 31, 2023

Applies to:

Symptoms

Unable to send an email using postfix under Oracle Linux Instance in Oracle Cloud Infrastructure

Error:

Jul 5 23:06:17 test0 postfix/smtp[46649]: Trusted TLS connection established to smtp.us-phoenix-1.oraclecloud.com[<IP>]:587: TLSv1.2 with cipher DHE-RSA-AES256-SHA256 (256/256 bits)
Jul 5 23:06:17 test0 postfix/smtp[46649]: 056761C0B4D: to=<user1@oracle.com>, relay=smtp.$(oci-region).oraclecloud.com[<IP>]:587, delay=0.25, delays=0.06/0.08/0.1/0.02, dsn=4.0.0, status=deferred (host smtp.us-$(oci-region).oraclecloud.com[<IP>] said: 471 Authorization failed: Envelope From address <opc@localhost.test.vcn1.oraclevcn.com> not authorized (in reply to MAIL FROM command)) <=== HERE

Changes

 Configured postfix using the following KM:

OCI Email Delivery - How to Setup Email Delivery in Postfix (Doc ID 2917400.1)

Cause

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