diff --git a/plugins/postfix/postfix_stats b/plugins/postfix/postfix_stats
index 7107c3dc..34a35bca 100755
--- a/plugins/postfix/postfix_stats
+++ b/plugins/postfix/postfix_stats
@@ -59,7 +59,7 @@ GPLv2
 =cut
 
 #set -xv
-SYS_LOG="${logfiles:-/var/log/mail.log /var/log/mail.log.1}"
+MAIL_LOG="${logfiles:-/var/log/mail.log /var/log/mail.log.1}"
 
 GREP_HOSTNAME="${0##*postfix_stats_}"
 
@@ -117,9 +117,9 @@ fi
 # Variable to store the pflogsumm result.
 # shellcheck disable=SC2086
 if [ -n "${GREP_HOSTNAME}" ]; then
-	TMP_RAW=$(grep -h " ${GREP_HOSTNAME} postfix/" ${SYS_LOG} | "${PFLOGSUMM}" -d today --detail 0 --zero-fill)
+	TMP_RAW=$(grep -h " ${GREP_HOSTNAME} postfix/" ${MAIL_LOG} | "${PFLOGSUMM}" -d today --detail 0 --zero-fill)
 else
-	TMP_RAW=$("${PFLOGSUMM}" -d today --detail 0 --zero-fill "${SYS_LOG}")
+	TMP_RAW=$("${PFLOGSUMM}" -d today --detail 0 --zero-fill "${MAIL_LOG}")
 fi
 
 # Parse value from Raw result