diff --git a/plugins/postfix/postfix_stats b/plugins/postfix/postfix_stats
index 8bfb212b..072435d4 100755
--- a/plugins/postfix/postfix_stats
+++ b/plugins/postfix/postfix_stats
@@ -127,7 +127,7 @@ fi
 # Variable to store the pflogsumm result.
 if [ -n "${FILTER_HOSTNAME}" ]; then
 	# shellcheck disable=SC2086
-	TMP_RAW=$(grep -h " ${FILTER_HOSTNAME} postfix/" ${MAIL_LOG} | "${PFLOGSUMM}" -d today --detail 0 --zero-fill)
+	TMP_RAW=$(grep -Fh " ${FILTER_HOSTNAME} postfix/" ${MAIL_LOG} | "${PFLOGSUMM}" -d today --detail 0 --zero-fill)
 else
 	# shellcheck disable=SC2086
 	TMP_RAW=$("${PFLOGSUMM}" -d today --detail 0 --zero-fill ${MAIL_LOG})