diff --git a/core/nginx/conf/nginx.conf b/core/nginx/conf/nginx.conf
index 4b560f9c..9afa0af9 100644
--- a/core/nginx/conf/nginx.conf
+++ b/core/nginx/conf/nginx.conf
@@ -325,7 +325,7 @@ mail {
     ssl_session_cache shared:SSLMAIL:3m;
     {% endif %}
 
-    {% if PROXY_PROTOCOL and REAL_IP_FROM %}{% for from_ip in REAL_IP_FROM.split(',') %}
+    {% if PROXY_PROTOCOL in ['all', 'mail'] and REAL_IP_FROM %}{% for from_ip in REAL_IP_FROM.split(',') %}
     set_real_ip_from {{ from_ip }};
     {% endfor %}{% endif %}