files = {
    '/etc/postfix/main.cf': {
        'source': 'postfix.cf',
        'content_type': 'mako',
        'mode': '0644',
        'context': {
            'hostname': node.metadata.get('mailman/hostname'),
        },
        'needs': {
            'pkg_apt:postfix',
        },
        'triggers': {
            'svc_systemd:postfix.service:restart',
        },
    }
}

svc_systemd = {
    'postfix.service': {
        'needs': {
            'pkg_apt:postfix',
        },
    },
    'mailman3.service': {
        'needs': {
            'pkg_apt:mailman3-full',
        },
    },
    'mailman3-web.service': {
        'needs': {
            'pkg_apt:mailman3-full',
        },
    },
}