diff --git a/nomad/email.hcl b/nomad/email.hcl
index 7f4ba50..2a70920 100644
--- a/nomad/email.hcl
+++ b/nomad/email.hcl
@@ -279,6 +279,7 @@ job "email" {
         address_mode = "host"
         tags = [
           "postfix",
+          "(diplonat (tcp_port 25 465 587))"
         ]
         check {
           type = "tcp"