I have read the documentation in detail and here is bare minimum config which I cannot figure out how to relay all my emails to external Maileroo SMTP with authentication. Please check the config and help if possible. local kumo = require 'kumo'
local dkim_sign = require 'policy-extras.dkim_sign'
local log_hooks = require 'policy-extras.log_hooks'

-- INIT
kumo.on('init', function()
  kumo.define_spool { name = 'data', path = '/var/spool/kumod/data' }
  kumo.define_spool { name = 'meta', path = '/var/spool/kumod/meta' }

    local relay_hosts_list = {
    '127.0.0.1', '::1', '10.0.0.0/8'
  }

  kumo.start_esmtp_listener {
    listen = '0.0.0.0:25',
    hostname = 'xyz.com',
    relay_hosts = relay_hosts_list,
  }

  kumo.start_esmtp_listener {
    listen = '0.0.0.0:587',
    hostname = 'xyz.com',
    tls_certificate = '/opt/kumomta/etc/ssl/STAR_xyz.com.pem',
    tls_private_key = '/opt/kumomta/etc/ssl/tes_pri.key',
    relay_hosts = relay_hosts_list,
  }

  kumo.start_http_listener {
    listen = '0.0.0.0:9090',
    trusted_hosts = { '127.0.0.1', '172.29.100.62' },
    use_tls = false,
  }

  kumo.configure_local_logs {
    log_dir = '/var/log/kumomta',
    meta = { 'route_via_maileroo' },
  }

  pcall(dkim_sign.setup, dkim_sign, {
    '/opt/kumomta/etc/dkim_data.toml',
    default_policy = 'SignIfPossible',
  })
end)

-- REGISTER EGRESS SOURCE
kumo.on('get_egress_source', function(name)
  if name == 'maileroo_source' then
    return kumo.make_egress_source {
      name = 'maileroo_source',
      ehlo_domain = 'xyz.com',
      source_address = '172.16.7.166',
      remote_port = 587,          -- outgoing port
      enable_starttls = true,
      smtp_auth = {
        type = 'plain',
        username = 'billing@xyz.com',
        password = 'XYZ_Password',
      },
      ha_proxy_server = nil,      -- optional
    }
  end
end)

-- REGISTER EGRESS POOL
kumo.on('get_egress_pool', function(name)
  if name == 'maileroo_pool' then
    return kumo.make_egress_pool {
      name = 'maileroo_pool',
      entries = { { name = 'maileroo_source', weight = 1 } },
    }
  end
end)

-- FORCE ALL OUTBOUND TO MAILEROO
kumo.on('route_message', function(msg)
  msg:set_meta('route_via_maileroo', true)
  msg:set_meta('egress_pool', 'maileroo_pool')
  return { action = 'accept' }
end)

-- QUEUE CONFIG
kumo.on('get_queue_config', function(queue_name)
  return kumo.make_queue_config {
    egress_pool = 'maileroo_pool',
    retry_interval = '5 minutes',
    max_age = '5 days',
  }
end) Also confirm if KumoMTA cannot directly relay to an external SMTP requiring authentication via make_egress_source function.