Use upstream's regexp

webmails/nginx-webmail.conf

@@ -37,7 +37,7 @@ server {
     }
 
     location ~ ^(.+\.php)(.*)$ {
-        fastcgi_split_path_info ^(.+?\.php)(/.*)$;
+        fastcgi_split_path_info ^(.+\.php)(.*)$;
         if (!-f $document_root$fastcgi_script_name) {
             return 404;
         }