diff --git a/build/Dockerfile b/build/Dockerfile
index 60917e4..7e7ef90 100644
--- a/build/Dockerfile
+++ b/build/Dockerfile
@@ -47,7 +47,7 @@ RUN apt-get update \
     && rm -rf /var/lib/apt/lists/*
 
 HEALTHCHECK --interval=30s --timeout=5s --retries=3 --start-period=120s \
-  CMD /bin/bash -c "true < /dev/tcp/localhost/25"
+  CMD /bin/bash -c "true < /dev/tcp/localhost/25 && true < /dev/tcp/localhost/143 && true < /dev/tcp/localhost/1025 && true < /dev/tcp/localhost/1143"
 
 ENTRYPOINT ["/protonmail/entrypoint.sh"]
 CMD ["run"]