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XCCDF
Guide to the Secure Configuration of Oracle Linux 7
Services
Mail Server Software
Configure SMTP For Mail Clients
Configure System to Forward All Mail From Postmaster to The Root Account
Configure System to Forward All Mail From Postmaster to The Root Account
An XCCDF Rule
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Configure System to Forward All Mail From Postmaster to The Root Account
Medium Severity
Verify the administrators are notified in the event of an audit processing failure. Check that the "/etc/aliases" file has a defined value for "root".
$ sudo grep "postmaster:\s*root$" /etc/aliases postmaster: root