Email类发送邮件失败，求助
这是控制器代码://以下设置Email参数$this->load->library('Email');
$config['smtp_host'] = 'smtpdm.aliyun.com';
$config['smtp_user'] = 'Xxxxxx .com';
$config['smtp_pass'] = 'xxxxxx';
$config['smtp_port'] = '25';
$config['protocol'] = 'smtp';
$config['charset'] = 'utf-8';
//$config['wordwrap'] = TRUE;
$config['mailtype'] = 'html';
$config['send_multipart'] = FALSE;
$this->email->initialize($config);
//加载CI的email类
//以下设置Email内容
$this->email->from('xxxxxx.com');
$this->email->to('xxxxxxxxxx@qq.com');
$this->email->subject('Email Test');
$this->email->message('<font color=red>Testing the email class.</font>');
$this->email->send();
echo $this->email->print_debugger(); //返回包含邮件内容的字符串，包括EMAIL头和EMAIL正文。用于调试。
报错信息是：
220 smtp.aliyun-inc.com MX AliMail Server(127.0.0.1)
hello: The following SMTP error was encountered:
Unable to send email using PHP SMTP. Your server might not be configured to send mail using this method.
User-Agent: CodeIgniterDate: Thu, 7 Jul 2016 05:21:14 +0200From: <xxxxxxxx.com>Return-Path: <xxxxxxxxxx.com>To: xxxxxxxxx@qq.comSubject: =?utf-8?Q?=45=6D=61=69=6C=20=54=65=73=74?=Reply-To: <xxxxxxxxxxxx.com>X-Sender: xxxxxxxxxx.comX-Mailer: CodeIgniterX-Priority: 3 (Normal)Message-ID: <577dcaaa6035c@send.weicewang.com>Mime-Version: 1.0Content-Type: text/html; charset=utf-8Content-Transfer-Encoding: quoted-printable=3Cfont color=3Dred=3ETesting the email class.=3C/font=3E
敏感信息隐藏了，跟这个应该是无关的，因为同样的配置用phpEmailer正常发送。求助啊该怎么解决这个问题
改用 phpmailer。。。我就是用的 phpmailer
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