Fix alpine postwhite

build/Dockerfile.alpine

@@ -41,7 +41,8 @@ RUN printf '%s\n' 'https://dl-cdn.alpinelinux.org/alpine/edge/main/' \
         server_names_hash_bucket_size 128;\n' -i /etc/nginx/nginx.conf \
     # Installer
     && /tmp/installer.sh \
-    && rm /tmp/installer.sh
+    && rm /tmp/installer.sh \
+    && sed -i '/while ps / s|; do| 2>\&1&|;s|while ps |while ls /proc/|' /usr/local/bin/postwhite/postwhite
 
 # Expose ports
 EXPOSE 25

build/run/docker-entrypoint/init.d/50-cron.sh

@@ -10,15 +10,12 @@ do
     sleep 1d
 done &
 
-# # Update Postscreen Whitelists (daily)
-# while true
-# do
-#     at midnight <<- postwhite
-# 	wget -q https://myvelabs.com/docker/myvemail-docker/raw/branch/master/data/postwhite -O /etc/postfix/postscreen_spf_whitelist.cidr
-# 	postfix reload
-# 	postwhite
-#     sleep 1d
-# done &
+# Update Postscreen Whitelists (daily)
+while true
+do
+    at -f /usr/local/bin/postwhite/postwhite midnight
+    sleep 1d
+done &
 
 # Update Yahoo! IPs for Postscreen Whitelists (weekly)
 while true