On Fri, Apr 09, 2004 at 03:02:15PM -0400, John Dalbec wrote:
> I changed my Exim configuration so that the dnslookup router uses a
> different transport with fallback_hosts specified. This works fine
> when the remote host doesn't respond. Is there any way to get Exim to
> fall back when the DNS lookup gives a deferral?
This is the config we use for exactly that issue:
#
# Remote deliveries are attempted here. Transport failures cause
# the fallback host to be used. In the event of DNS lookup timeout,
# the pass_on_timeout entry forces our next router to be used which
# passes everything on to our fallback. Domains that get a successful
# lookup, but dont exist (NXDOMAIN), cause an immediate bounce since
# the no_more option is set.
remote_domains:
driver = dnslookup
self = fail
pass_on_timeout
transport = remote_smtp
fallback_hosts = fallbackhost.yourdomain.com
no_more
#
# Fallback queue. This router is only executed when we've passed on
# DNS timeouts in our remote_domains router. The SMTP fallback_hosts
# setting does not catch DNS timeouts since fallback_hosts is actually
# handled at the transport level, not the routing level.
send_to_fallback:
driver = manualroute
route_data = fallbackhost.yourdomain.com
transport = remote_smtp
--
Dean Brooks
dean@???
