(Top post - on account of stupid temporary MS mail client - Sorry)
The best way to get around this is to use a "smart host" for the internal
domains. This means routing mail for internal domains via a server that can
deliver to the internal domains. If all the domains are on one server, you
can use that server as a smart host and all mail to internal domains will go
right to the destination, skipping DNS lookups and other checks. If there is
a server on your network that can deliver to all these domains, using that
server as a smart host will forward all internal mail via that machine.
Setting up the route for this is very simple. Just place this directly above
the "dnslookup" router in your routers configuration:
#This example assumes you are running Exim 4.
direct_internal:
driver = manualroute
transport = remote_smtp
route_list = !+internal_domains 1.2.3.4
Here 1.2.3.4 should be the address of the internal server you plan to use.
You also need to specify the domains. The best way to do this is to add this
in the primary configuration, preferably near to where the other domain
lists, like local_domains, relay_for_domains, etc. are located:
domainlist internal_domains =
/usr/local/etc/internal_domains
Now, in the file /usr/local/etc/internal_domains, create a newline seperate
list of domains that are to be handled in this way, for example:
example.com
customer1.com
customer2.com
myfamily.org
In this way, you need only modify the file when a new domain is to be added,
and no reload of the Exim configuration file as needed each time you add a
domain. The flat file can also be handled with a shell script, or, if you
prefer, you may use a database to do this lookup, check the Exim
specifications.
Will
----- Original Message -----
From: "syn uw" <syn_uw@???>
To: <exim-users@???>
Sent: Saturday, January 03, 2004 11:38 PM
Subject: [Exim] Problem with exim on internal network
Hello,
We are running EXIM on Linux on an internal web server running on a internal
private network (hidden by NAT). EXIM is only responsible for sending out
mails from our webmail system. The problem that we are encountering is when
we are sending mails to domains that are hosted on our server: EXIM does an
MX lookup for a domain hosted on our servers and then gets the external IP
address of that our server and not the internal address. I tryed to force
this by entering our mail server host's internal IP in /etc/hosts but still
it takes the external address. Thus mails get undelivered as from the
internal network it's not posible to use external IP addresses (that's how
our OpenBSD firewall works).
Does anyone have an idea ?
Many thanks in advance for your help!
Regards
_________________________________________________________________
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