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Location: majic-ansible-roles/roles/mail_forwarder/templates/ferm_mail.conf.j2

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branko

MAR-181: Drop support for Debian 9 Stretch from the backup_client role:

- Provide more details on use of pexpect+sftp backed for
Duplicity (backend has to be used on Debian 10 Buster as well, not
just Debian 9 Stretch).
- Switch to using IPs from VirtualBox default allowed host-only
network subnets.

{% if smtp_relay_host and smtp_from_relay_allowed %}
domain ip {
    # Accept incoming connections on port 25 from SMTP relay host.
    table filter {
        chain INPUT {
            # SMTP for server communication.
            proto tcp dport 25 {
                saddr {{ smtp_relay_host }} ACCEPT;
            }
        }
    }
}

{% if lookup('dig', smtp_relay_host + '/AAAA') not in ['NXDOMAIN', ''] %}
domain ip6 {
    # Accept incoming connections on port 25 from SMTP relay host.
    table filter {
        chain INPUT {
            # SMTP for server communication.
            proto tcp dport 25 {
                saddr {{ smtp_relay_host }} ACCEPT;
            }
        }
    }
}
{% endif %}
{% endif %}