diff --git a/roles/mail_forwarder/tasks/main.yml b/roles/mail_forwarder/tasks/main.yml
index 3d8362ce49cdd13558151b5f6ea3e0231d5f9a7f..a6bde5bb0f30e2da8d432fae9c84f13e8b80f467 100644
--- a/roles/mail_forwarder/tasks/main.yml
+++ b/roles/mail_forwarder/tasks/main.yml
@@ -24,6 +24,16 @@
     group: root
     mode: 0644
 
+- name: Generate the SMTP server Diffie-Helman parameter
+  openssl_dhparam:
+    owner: root
+    group: root
+    mode: 0640
+    path: "/etc/ssl/private/{{ ansible_fqdn }}_smtp.dh.pem"
+    size: 2048
+  notify:
+    - Restart Postfix
+
 - name: Configure visible mail name of the system
   copy:
     content: "{{ inventory_hostname }}"