diff --git a/.config/ranger/scope.sh b/.config/ranger/scope.sh
index 13a25b4..c197bd8 100755
--- a/.config/ranger/scope.sh
+++ b/.config/ranger/scope.sh
@@ -167,7 +167,7 @@ handle_mime() {
     local mimetype="${1}"
     case "${mimetype}" in
         # Text
-        text/* | */xml)
+        text/* | */xml | message/*)
             # Syntax highlight
             if [[ "$( stat --printf='%s' -- "${FILE_PATH}" )" -gt "${HIGHLIGHT_SIZE_MAX}" ]]; then
                 exit 2