I'm trying to make exim4 read the relay hosts from a file. i tryed lsearch:
# /etc/exim4/update-exim4.conf.conf
dc_relay_domains='lsearch;/etc/exim4/relay_domains'
but it produces a warning and doesent work...
WARNING: using 'lookup;' constructs in /etc/exim4/update-exim4.conf.conf has never been supported!