'postfix': {
    'database': {
        'username': 'vmail_bw',
        'password': '[generated]',
        'db': 'vmail_bw',
        'host': '127.0.0.1',
    },
    'ssl_cert': '/etc/letsencrypt/live/example.org/fullchain.pem',
    'ssl_key': '/etc/letsencrypt/live/example.org/privkey.pem',
    'mynetworks': [],
    'myhostname': 'example.org',
    'max_queue_lifetime': '1h',
    'bounce_queue_lifetime': '1h',
    'max_backoff_time': '15m',
    'min_backoff_time': '5m',
    'queue_run_delay': '5m',
    'max_msg_size': 52428800, # 50MB
}