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Error Sending Email - "host refused to talk to me: 554 Blocked" (Doc ID 2785735.1)

Last updated on JUNE 23, 2021

Applies to:

Oracle Cloud Infrastructure - Version N/A and later
Linux OS - Version Oracle Linux 6.0 and later
Information in this document applies to any platform.


In postfix logs, the following error shows after sending emails:

Jun 15 17:39:28 <HOSTNAME> postfix/smtp[13976]: XXXXXXXXXXX: host <external hostname>[<IP ADDRESS>] refused to talk to me: 554 Blocked - see https://external-email-filter-provider/?


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