diff --git a/roles/mail_server/tasks/main.yml b/roles/mail_server/tasks/main.yml
index 397a9a767dd8027392e353015b6afe01dfb3425e..1040096b30f8ae88c83fad6881a0aa3ed7dc260a 100644
--- a/roles/mail_server/tasks/main.yml
+++ b/roles/mail_server/tasks/main.yml
@@ -171,7 +171,7 @@
 
 - name: Configure visible mail name of the system
   ansible.builtin.copy:
-    content: "{{ inventory_hostname }}"
+    content: "{{ ansible_fqdn }}"
     dest: "/etc/mailname"
     owner: root
     group: root