diff --git a/Dockerfile b/Dockerfile
index 333db2e..d76c988 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,12 +14,14 @@ RUN apk update && \
 
 ADD requirements.txt /data/requirements.txt
 ADD smtp2slack4qnap.py /data/smtp2slack4qnap.py
+ADD start.sh /usr/local/bin/start/sh
 
 RUN pip3 install -r /data/requirements.txt && \
+    chmod 755 /usr/local/bin/start.sh && \
     rm -rf /tmp/src && rm -rf /var/cache/apk/* 
 
 #USER python
 
 EXPOSE 1025
 
-CMD [ "/bin/sh", "-c", "/usr/bin/python3 /data/smtp2slack4qnap.py" ]
+CMD [ "/usr/local/bin/start.sh" ]
diff --git a/start.sh b/start.sh
new file mode 100644
index 0000000..cf71dda
--- /dev/null
+++ b/start.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "Starting SMTP Server"
+python3 /data/smtp2slack4qnap.py