diff --git a/CHANGELOG.md b/CHANGELOG.md
index a1bdab03..1ee9280f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ Software updates:
 
 * Upgraded Nextcloud from 15.0.8 to 16.0.5 (with Contacts from 3.1.1 to 3.1.4 and Calendar from 1.6.5 to 1.7.1)
 
+Mail:
+
+* Fetching of updated whitelist for greylisting was fetching each day instead of every month.
+
 v0.43 (September 1, 2019)
 -------------------------
 
diff --git a/setup/mail-postfix.sh b/setup/mail-postfix.sh
index 283d08af..e39f8aff 100755
--- a/setup/mail-postfix.sh
+++ b/setup/mail-postfix.sh
@@ -218,7 +218,7 @@ cat > /etc/cron.daily/mailinabox-postgrey-whitelist << EOF;
 # Mail-in-a-Box
 
 # check we have a postgrey_whitelist_clients file and that it is not older than 28 days
-if [ ! -f /etc/postgrey/whitelist_clients ] || find /etc/postgrey/whitelist_clients -mtime +28 > /dev/null ; then
+if [ ! -f /etc/postgrey/whitelist_clients ] || find /etc/postgrey/whitelist_clients -mtime +28 | grep -q '.' ; then
     # ok we need to update the file, so lets try to fetch it
     if curl https://postgrey.schweikert.ch/pub/postgrey_whitelist_clients --output /tmp/postgrey_whitelist_clients -sS --fail > /dev/null 2>&1 ; then
         # if fetching hasn't failed yet then check it is a plain text file