add postscreen whitelist update script

helper-scripts/update_postscreen_whitelist.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
+WORKING_DIR=${SCRIPT_DIR}/postwhite_tmp
+SPFTOOLS_DIR=${WORKING_DIR}/spf-tools
+POSTWHITE_DIR=${WORKING_DIR}/postwhite
+POSTWHITE_CONF=${POSTWHITE_DIR}/postwhite.conf
+
+COSTOM_HOSTS="web.de gmx.net mail.de freenet.de arcor.de unity-mail.de"
+STATIC_HOSTS=(
+    "194.25.134.0/24 permit # t-online.de"
+)
+
+mkdir ${SCRIPT_DIR}/postwhite_tmp
+git clone https://github.com/spf-tools/spf-tools.git ${SPFTOOLS_DIR}
+git clone https://github.com/stevejenkins/postwhite.git ${POSTWHITE_DIR}
+
+function set_config() {
+    sudo sed -i "s@^\($1\s*=\s*\).*\$@\1$2@" ${POSTWHITE_CONF}
+}
+
+set_config custom_hosts ${COSTOM_HOSTS}
+set_config reload_postfix no
+set_config postfixpath /.
+set_config spftoolspath ${WORKING_DIR}/spf-tools
+set_config whitelist .${SCRIPT_DIR}/../data/conf/postfix/postscreen_access.cidr
+set_config yahoo_static_hosts ${POSTWHITE_DIR}/yahoo_static_hosts.txt
+
+cd ${POSTWHITE_DIR}
+./postwhite ${POSTWHITE_CONF}
+
+( IFS=$'\n'; echo "${STATIC_HOSTS[*]}" >> "${SCRIPT_DIR}/../data/conf/postfix/postscreen_access.cidr")
+
+rm -r ${WORKING_DIR}