diff --git a/phpBB/common.php b/phpBB/common.php
index 357d85bdf4..f9d8fc769f 100644
--- a/phpBB/common.php
+++ b/phpBB/common.php
@@ -155,22 +155,6 @@ $user_ip = encode_ip($client_ip);
 //
 // Set some server variables related to the current URL, mostly used for Email
 //
-if ( !empty($HTTP_SERVER_VARS['PHP_SELF']) || !empty($HTTP_ENV_VARS['PHP_SELF']) )
-{
-	$script_name = ( !empty($HTTP_SERVER_VARS['PHP_SELF']) ) ? $HTTP_SERVER_VARS['PHP_SELF'] : $HTTP_ENV_VARS['PHP_SELF'];
-}
-else if ( !empty($HTTP_SERVER_VARS['SCRIPT_NAME']) || !empty($HTTP_ENV_VARS['SCRIPT_NAME']) )
-{
-	$script_name = ( !empty($HTTP_SERVER_VARS['SCRIPT_NAME']) ) ? $HTTP_SERVER_VARS['SCRIPT_NAME'] : $HTTP_ENV_VARS['SCRIPT_NAME'];
-}
-else if ( !empty($HTTP_SERVER_VARS['PATH_INFO']) || !empty($HTTP_ENV_VARS['PATH_INFO']) )
-{
-	$script_name = ( !empty($HTTP_SERVER_VARS['PATH_INFO']) ) ? $HTTP_SERVER_VARS['PATH_INFO'] : $HTTP_ENV_VARS['PATH_INFO'];
-}
-
-$server_name = $board_config['server_name'];
-$server_port = ( $board_config['server_port'] <> 80 ) ? ':' . $board_config['server_port'] . '/' : '/';
-
 if ( !empty($HTTP_SERVER_VARS['HTTPS']) )
 {
 	$server_protocol = ( !empty($HTTP_SERVER_VARS['HTTPS']) ) ?  ( ( $HTTP_SERVER_VARS['HTTPS'] == "on" ) ? "https://" : "http://" )  : "http://";
@@ -184,6 +168,42 @@ else
 	$server_protocol = "http://";
 }
 
+if ( !empty($board_config['server_name']) )
+{
+	$server_name = $board_config['server_name'];
+}
+else if ( !empty($board_config['cookie_domain']) )
+{
+	$server_name = $board_config['cookie_domain'];
+}
+else if( !empty($HTTP_SERVER_VARS['SERVER_NAME']) || !empty($HTTP_ENV_VARS['SERVER_NAME']) )
+{
+	$server_name = ( !empty($HTTP_SERVER_VARS['SERVER_NAME']) ) ? $HTTP_SERVER_VARS['SERVER_NAME'] : $HTTP_ENV_VARS['SERVER_NAME'];
+}
+else if( !empty($HTTP_SERVER_VARS['HTTP_HOST']) || !empty($HTTP_ENV_VARS['HTTP_HOST']) )
+{
+	$server_name = ( !empty($HTTP_SERVER_VARS['HTTP_HOST']) ) ? $HTTP_SERVER_VARS['HTTP_HOST'] : $HTTP_ENV_VARS['HTTP_HOST'];
+}
+else
+{
+	$server_name = "";
+}
+
+$server_port = ( $board_config['server_port'] <> 80 ) ? ':' . $board_config['server_port'] . '/' : '/';
+
+if ( !empty($HTTP_SERVER_VARS['PHP_SELF']) || !empty($HTTP_ENV_VARS['PHP_SELF']) )
+{
+	$script_name = ( !empty($HTTP_SERVER_VARS['PHP_SELF']) ) ? $HTTP_SERVER_VARS['PHP_SELF'] : $HTTP_ENV_VARS['PHP_SELF'];
+}
+else if ( !empty($HTTP_SERVER_VARS['SCRIPT_NAME']) || !empty($HTTP_ENV_VARS['SCRIPT_NAME']) )
+{
+	$script_name = ( !empty($HTTP_SERVER_VARS['SCRIPT_NAME']) ) ? $HTTP_SERVER_VARS['SCRIPT_NAME'] : $HTTP_ENV_VARS['SCRIPT_NAME'];
+}
+else if ( !empty($HTTP_SERVER_VARS['PATH_INFO']) || !empty($HTTP_ENV_VARS['PATH_INFO']) )
+{
+	$script_name = ( !empty($HTTP_SERVER_VARS['PATH_INFO']) ) ? $HTTP_SERVER_VARS['PATH_INFO'] : $HTTP_ENV_VARS['PATH_INFO'];
+}
+
 $script_url = $server_protocol . $server_name . $server_port . $script_name;