diff --git a/tasks/packages.yml b/tasks/packages.yml
index 2206f43..2aaddd3 100644
--- a/tasks/packages.yml
+++ b/tasks/packages.yml
@@ -13,9 +13,14 @@
       - postfix
       - postfix-cdb
       - postfix-pcre
-      - postfix-mta-sts-resolver
     cache_valid_time: 3600
 
+- name: "Package | Install MTA-STS-Resolver"
+  ansible.builtin.apt:
+    pkg:
+      - postfix-mta-sts-resolver
+  when: postfix_type == "internet"
+
 - name: "Packages | Install Unbound"
   ansible.builtin.apt:
     pkg: