add package_postfix_installed to multiple controls

Author: Arden97

controls/hipaa.yml

@@ -1248,6 +1248,7 @@ controls:
           - auditd_data_retention_max_log_file_action
           - auditd_data_retention_max_log_file_action_stig
           - auditd_data_retention_space_left_action
+          - package_postfix_installed
           - package_rsyslog_installed
           - service_rsyslog_enabled
           - partition_for_var_log_audit

controls/pcidss_3.yml

@@ -2130,6 +2130,7 @@ controls:
           - auditd_data_retention_space_left
           - auditd_data_retention_admin_space_left_action
           - auditd_data_retention_action_mail_acct
+          - package_postfix_installed
 
     - id: Req-10.8
       title: 10.8 Ensure that security policies and operational procedures for monitoring all access

controls/pcidss_4.yml

@@ -2967,6 +2967,7 @@ controls:
                 - auditd_data_retention_admin_space_left_action
                 - auditd_data_retention_space_left
                 - auditd_data_retention_space_left_action
+                - package_postfix_installed
                 - package_logrotate_installed
                 - timer_logrotate_enabled
             related_rules:

controls/srg_gpos/SRG-OS-000046-GPOS-00022.yml

@@ -5,6 +5,7 @@ controls:
         title: {{{ full_name }}} must alert the ISSO and SA (at a minimum) in the event
             of an audit processing failure.
         rules:
+            - package_postfix_installed
             - postfix_client_configure_mail_alias
             - postfix_client_configure_mail_alias_postmaster
             - var_postfix_root_mail_alias=mil_sysadmin

products/rhel9/controls/cis_rhel9.yml

@@ -2560,6 +2560,7 @@ controls:
           - auditd_data_retention_action_mail_acct
           - auditd_data_retention_admin_space_left_action
           - auditd_data_retention_space_left_action
+          - package_postfix_installed
           - var_auditd_action_mail_acct=root
           - var_auditd_admin_space_left_action=cis_rhel9
           - var_auditd_space_left_action=cis_rhel9