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Description of problem:

The postfix role can use the firewall role and the selinux role to manage port access.

### postfix_manage_firewall

Boolean flag allowing to configure firewall using the firewall role.
Manage the smtp related ports, 25/tcp, 465/tcp, and 587/tcp.
If the variable is set to `false`, the `postfix role` does not manage the
firewall.
Default to `false`.

NOTE: `postfix_manage_firewall` is limited to *adding* ports.
It cannot be used for *removing* ports.
If you want to remove ports, you will need to use the firewall system
role directly.

NOTE: the firewall management is not supported on RHEL 6.

### postfix_manage_selinux

Boolean flag allowing to configure selinux using the selinux role.
Assign `smtp_port_t` to the smtp related ports.
If the variable is set to false, the `postfix role` does not manage the
selinux

NOTE: `postfix_manage_selinux` is limited to *adding* policy.
It cannot be used for *removing* policy.
If you want to remove policy, you will need to use the selinux system
role directly.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (rhel-system-roles bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2023:2246