Type Enforcement is the main permission control used in SELinux targeted policy. All files and processes are labeled with a type: types define a domain for processes and a type for files. SELinux policy rules define how types access each other, whether it be a domain accessing a type, or a domain accessing another domain. Access is only allowed if a specific SELinux policy rule exists that allows it.
The following types are used with Postfix. Different types all you to configure flexible access:
postfix_etc_t
This type is used for configuration files for Postfix in /etc/postfix.
postfix_data_t
This type is used for Postfix data files in /var/lib/postfix.
To see the full list of files and their types for Postfix, run the following command:
$ grep postfix /etc/selinux/targeted/contexts/files/file_contexts
