[exim] Set local_interfaces to contents of a file?

Hi Fellow Admins,



I have been trying to set local_interfaces equal to the contents of a file
on the file system. OS is Ubuntu 10.04 Lucid. Exim is 4.71.



The file is /etc/fulcrumIpSettings



Its contents are:



127.0.0.1:192.168.121.123



I have tried each of the following with none working successfully:



Test A: MAIN_LOCAL_INTERFACES = ${if exists{/etc/fulcrumIpSettings}\

                                          {etc/fulcrumIpSettings}\

                                          {127.0.0.1}}

Test B: MAIN_LOCAL_INTERFACES = /etc/fulcrumIpSettings



Test C: MAIN_LOCAL_INTERFACES = ${/etc/fulcrumIpSettings}



Test D: MAIN_LOCAL_INTERFACES = ${</etc/fulcrumIpSettings}





And then:



local_interfaces = MAIN_LOCAL_INTERFACES



I am trying to have the result of reading the file to be equivalent to
setting:

local_interfaces = 127.0.0.1:192.168.121.123



The error that I get is [9905] Malformed IP address
"${</etc/fulcrumIpSettings}" in local_interfaces



(Of course the part in quotes in the error above contains the first line of
the right side of the equals sign for each of the tests -in this case Test
D.)



I have been searching google and trying to find something in the manual but
have not found a solution. Any thoughts or suggestions would be very
valuable and appreciated.



Thanks