diff --git a/services/email/vsmtp/config.vsl b/services/email/vsmtp/config.vsl
index 37ea16180..f65c4dff2 100644
--- a/services/email/vsmtp/config.vsl
+++ b/services/email/vsmtp/config.vsl
@@ -13,7 +13,7 @@ fn on_config(config) {
   // Specify addresses that the server will listen to.
   config.server.interfaces = #{
     addr: ["[::]:25"],
-    addr_submission: [],
+    addr_submission: ["[::]:587"],
     addr_submissions: [],
   };