diff --git a/yum-cron/yum-cron.sh b/yum-cron/yum-cron.sh
index e300fa7..64cef96 100755
--- a/yum-cron/yum-cron.sh
+++ b/yum-cron/yum-cron.sh
@@ -157,14 +157,25 @@ fi
 
 } >> $YUMOUTPUT 2>&1
 
+SUMFILE=/var/cache/yum/yum-cron.last
+touch $SUMFILE
+[[ -x /sbin/restorecon ]] && /sbin/restorecon $SUMFILE
+
+OLDSUM="$(cat $SUMFILE)"
+NEWSUM="$(sha1sum -b $YUMOUTPUT | cut -d' ' -f1)"
+if [[ "$MAIL_ONLY_IF_CHANGED" == "yes" && "$OLDSUM" == "$NEWSUM" ]]; then
+    rm -f $YUMOUTPUT
+    exit 0
+fi
+
 if [[ ! -z "$MAILTO" && -x /bin/mail ]]; then 
 # If MAILTO is set, use mail command for prettier output.
   [[ -s "$YUMOUTPUT" ]] && \
     mail -s "System update: $SYSTEMNAME" $MAILTO < $YUMOUTPUT && \
-    rm -f $YUMOUTPUT
+    echo "$NEWSUM" > $SUMFILE && rm -f $YUMOUTPUT
 else 
 # The default behavior is to use cron's internal mailing of output.
-  cat $YUMOUTPUT && rm -f $YUMOUTPUT
+  cat $YUMOUTPUT && echo "$NEWSUM" > $SUMFILE && rm -f $YUMOUTPUT
 fi 
 
 exit 0
diff --git a/yum-cron/yum-cron.sysconfig b/yum-cron/yum-cron.sysconfig
index 4c8c40d..b26c021 100644
--- a/yum-cron/yum-cron.sysconfig
+++ b/yum-cron/yum-cron.sysconfig
@@ -27,6 +27,9 @@ DOWNLOAD_ONLY=no
 # (Valid options: yes|no)
 CHECK_FIRST=no
 
+# Send mail only if nothing changed since the last run.
+# (Valid options: yes|no)
+MAIL_ONLY_IF_CHANGED=no
 
 # Yum error level. The practical range is 0-10, where 0 means print
 # only critical errors, and 10 means print all errors, even ones that
diff --git a/yum.spec b/yum.spec
index b78a9f6..8e52f99 100644
--- a/yum.spec
+++ b/yum.spec
@@ -284,6 +284,7 @@ exit 0
 %dir %{_datadir}/yum-cron   
 %{_datadir}/yum-cron/update.yum
 %{_datadir}/yum-cron/cleanup.yum
+%ghost /var/cache/yum/yum-cron.last
 
 %if %{yum_updatesd}
 %files updatesd