服务器中的设置是什么/etc/hostname 文件基于wp\\U邮件源代码：

if ( !isset( $from_email ) ) {
    // Get the site domain and get rid of www.
    $sitename = strtolower( $_SERVER[\'SERVER_NAME\'] );
    if ( substr( $sitename, 0, 4 ) == \'www.\' ) {
        $sitename = substr( $sitename, 4 );
    }
    $from_email = \'wordpress@\' . $sitename;
}