diff --git a/core/postfix/Dockerfile b/core/postfix/Dockerfile
index dab4396c..df902dd4 100644
--- a/core/postfix/Dockerfile
+++ b/core/postfix/Dockerfile
@@ -15,7 +15,7 @@ COPY start.py /
 RUN echo $VERSION >/version
 
 EXPOSE 25/tcp 10025/tcp
-HEALTHCHECK --start-period=350s CMD echo QUIT|nc localhost 25|grep "220 .* ESMTP Postfix"
+HEALTHCHECK --start-period=350s CMD /usr/sbin/postfix status
 
 VOLUME ["/queue"]