Peter's Blog 30.7.2004

Exim recipe to forward users in local domain to another smtp server

Problem: an email server has a couple of local user accounts defined but the remaining users are handled by another server. How to route email to them?

Edit exim.conf. The last rule of the routing configuration should have the term

    cannot_route_message = Unknown user

in it to bin messages that cannot be delivered. Comment that line out and add the following clause as the last routing term:

  #
  # pcw: route users in the local domain but not on this server to gateway
  #
  send_to_gateway:
    driver = manualroute
    domains = +local_domains
    transport = remote_smtp
    route_list = * gateway.mycompany.com
    cannot_route_message = Unknown user