[exim] smarthosts & sender_verification

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Autor: Chris Knipe
Datum:  
To: exim-users
Betreff: [exim] smarthosts & sender_verification
Lo all,

We use allot of smarthosts to relay all our incoming / outgoing mail through
dedicated servers (mostly for spam / virus / etc).

Sometimes, not all of the servers will be available, they might for example
be in the process of restarting due to a policy change in the configuration.

Is there a way to use a smarthost as a email "gateway", but to NOT use the
smarthost as a gateway for sender verification?

Basically, something like

routers:
spam_gateway:
driver = manualroute
condition = "${if eq {$interface_port}{10025} {0}{1}}"
transport = spam
route_list = "* spam.host.name byname"
self = send

sender_verify:
  driver = dnslookup
  domains = !+local_domains
  ignore_target_hosts = 
0.0.0.0/8:10.0.0.0/8:172.16.0.0/12:192.168.0.0/16:127.0.0.0/8: \
                        169.254.0.0/16:192.0.2.0/24:192.88.99.0/24:224.0.0.0/4:240.0.0.0/4
  no_more
  transport = remote_smtp


So based on the above, I want all actual MAIL to go to spam_gateway, but I
want to use dnslookup for sender_verification....

Thanks,
Chris.