diff --git a/tasks/website.yml b/tasks/website.yml
index dfcb4a2..196a544 100644
--- a/tasks/website.yml
+++ b/tasks/website.yml
@@ -3,7 +3,9 @@
   when: mailserver_mx_domain != ""
   lineinfile:
     path: /etc/dehydrated/domains.txt
-    line: "{{ mailserver_mx_domain }}"
+    regexp: '(.+){{ mailserver_mx_domain }}(.*)?'
+    line: '\1{{ mailserver_mx_domain }}\2'
+    backrefs: yes
 
 - name: website - nginx domain
   notify: reload nginx