# This router routes to remote hosts over SMTP using a DNS lookup with
# default options.
dnslookup:
  driver = dnslookup
  domains = ! +local_domains
  # Let's not deal with "impossible" target IP addresses
  ignore_target_hosts = +bogusips
  # Optimization since the dnslookup router is independent of the local part
  same_domain_copy_routing = yes
  transport = remote_smtp