This file is indexed.

config is in courier-mta 0.76.3-5+deb9u1.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#! /bin/sh -e

# Source debconf library
. /usr/share/debconf/confmodule

do_config () {
    FILENAME=$1
    DEFAULT=$2

    if [ -f /etc/courier/$FILENAME ]; then
	# read current value from configuration file
	VALUE=`head -n 1 /etc/courier/$FILENAME`
	if [ "$VALUE" ]; then
	    db_set courier-mta/$FILENAME "$VALUE"
	fi
    fi

    db_get courier-mta/$FILENAME
    if [ ! "$RET" ]; then
	# enforce default
	db_set courier-mta/$FILENAME "$DEFAULT"
    fi
	
    db_input medium courier-mta/$FILENAME || [ $? -eq 30 ]
    db_go
}

do_config defaultdomain `hostname --fqdn`
db_get courier-mta/defaultdomain
do_config dsnfrom "mailer-daemon@$RET"