diff --git a/src/mailsrv/Containerfile b/src/mailsrv/Containerfile
index fc79b97..6db1773 100644
--- a/src/mailsrv/Containerfile
+++ b/src/mailsrv/Containerfile
@@ -35,11 +35,9 @@ RUN addgroup --gid ${FILESUID:?} vmail && \
 # copy our custom scripts
 COPY assets/bin /usr/local/bin
 
-# copy root's crontab
-COPY assets/crontab /root/
-
-# load root's crontab
-RUN crontab /root/crontab
+# put restart job in system crontab
+RUN echo '# restart postfix and dovecot every Monday at 3AM' >> /etc/crontab && \
+    echo '23 3    * * 1   root    systemctl restart postfix && systemctl restart dovecot' >> /etc/crontab
 
 ###
 ### mkvirtual