diff --git a/webmails/nginx-webmail.conf b/webmails/nginx-webmail.conf
index 1794a635..1bc00912 100644
--- a/webmails/nginx-webmail.conf
+++ b/webmails/nginx-webmail.conf
@@ -26,6 +26,14 @@ server {
     add_header X-Permitted-Cross-Domain-Policies "none" always;
     add_header Referrer-Policy "no-referrer" always;
 
+    real_ip_header X-Real-IP;
+    {% for from_ip in SUBNET.split(',') %}
+    set_real_ip_from {{ from_ip }};
+    {% endfor %}
+    {% if SUBNET6 %}{% for from_ip in SUBNET6.split(',') %}
+    set_real_ip_from {{ from_ip }};
+    {% endfor %}{% endif %}
+
     location / {
         try_files $uri $uri/ /index.php$args;
     }