Ansible Role: postfix-null-client

This role installs postfix on a null client. Supported on EL6 and EL7.

Requirements

None.

Role Variables

Note, the only variable you should change is the relayhost. The other variables are part of the null client configuration.

Set the myhostname to the FQDN of the machine:

postfix_myhostname: "{{ ansible_fqdn }}"

mydomain is used as a default for the relayhost even though it is not explicitly part of the null client configuration:

postfix_mydomain: "{{ ansible_domain }}"

Locally sent mail will appear to come from this domain. If there are many machines on the network configured as null clients, setting this to $myhostname could help identify the source of the mail. This could also be set to $mydomain so that mail doesn't inadvertently get sent to this null client machine:

postfix_myorigin: "$myhostname"

Forward all messages to this mail server. Square brackets around the hostname will prevent MX record lookups:

postfix_relayhost: "$mydomain"

Listen only on the loopback interface and do not accept mail from the network:

postfix_inet_interfaces: "loopback-only"

Disable local delivery altogether:

postfix_local_transport: "error: local delivery disabled"

Only accept mail from localhost:

postfix_mynetworks: "127.0.0.0/8 [::1]/128"

List of trusted networks for relay access. host tells Postfix to only trust the local machine. This has the same effect as the postfix_mynetworks setting above, but better to be explicit:

postfix_mynetworks_style: host

Dependencies

None.

Example Playbook

- hosts: servers
  vars:
    postfix_relayhost: "relay01.example.com"
  roles:
     - giovtorres.postfix-null-client

License

BSD