diff --git a/conf/nginx-alldomains.conf b/conf/nginx-alldomains.conf
index 1db7606c..554081f3 100644
--- a/conf/nginx-alldomains.conf
+++ b/conf/nginx-alldomains.conf
@@ -12,6 +12,11 @@
 		access_log off;
 	}
 
+    location ~* \.(jpg|jpeg|png|gif|ico|css|js)$ {
+        expires 30d;
+        add_header Cache-Control "public";
+    }
+
 	location = /mailinabox.mobileconfig {
 		alias /var/lib/mailinabox/mobileconfig.xml;
 	}