diff --git a/run.sh b/run.sh
index 7bf1924f8bdaef79d7dc48c20e668356797d594d..e5bff8ebda8017934f5d8d59aab7f0b37568d526 100755
--- a/run.sh
+++ b/run.sh
@@ -24,6 +24,13 @@ function preview {
     echo ""
 }
 
+PREVIEW_TEXT="$(preview)"
+
+if [ -z "${PREVIEW_TEXT}" ]
+then
+    (>&2 echo "nothing to send")
+    exit 0
+fi
 
 (cat << EOF
 Subject: Programm-Info-Bot