diff --git a/Dockerfile b/Dockerfile
index f3e4281..a0352eb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -52,6 +52,7 @@ COPY --from=builder /app/node_modules/next/dist/compiled/jest-worker ./node_modu
 USER nextjs
 
 EXPOSE 3000
+EXPOSE 587
 
 ENV PORT 3000
 ENV HOSTNAME "0.0.0.0"