Postfix Configuration As Relay For Office365 to Solve The Error "Client Was Not Authenticated To Send Anonymous Mail During MAIL FROM" (Doc ID 2013640.1)

Last updated on AUGUST 04, 2018

Applies to:

Linux OS - Version Oracle Linux 6.5 with Unbreakable Enterprise Kernel [3.8.13] and later
Linux x86-64

Oracle Linux 6.5 with Unbreakable Enterprise Kernel [3.8.13] version, working as Mailserver
A requirement to send unauthenticated mail.
Using Office365 and this uses authentication (TLS and user/password), to overcome this using postfix as a relay for OFFICE365.
Postfix has been configured but do not seem to be able to successfully change the 'FROM' identity as receiving the following error with the mail not being delivered.

Postfix relay for office365 ends with error "Client was not authenticated to send anonymous mail during MAIL FROM"

Postfix used as a Relay for office365

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