CodeIgniter-无法仅在我自己的服务器上使用PHP SMTP发送电子邮件

我正在使用CodeIgniter使用以下代码发送电子邮件：

$config['protocol'] = "smtp";
$config['smtp_host'] = "mail.******.com";
$config['smtp_port'] = "25";
$config['smtp_user'] = "****@****.com";
$config['smtp_pass'] = "*****";
$config['charset'] = "utf-8";
$config['mailtype'] = "html";
$config['send_multipart'] = \r\n;
$config['crlf'] = "\r\n";

$this->email->initialize($config);
$this->email->set_newline("\r\n");

当我在在线服务器上运行（公共托管）时，它会成功

但是，当我在本地服务器上执行代码时，出现了以下错误

Failed to send AUTH LOGIN command. Error: 
Unable to send email using PHP SMTP. Your server might not be configured to send mail using this method.

User-Agent: CodeIgniter

---

我的代码或服务器配置是否有任何错误？

初始化前加载库。希望这有帮助

 $this->load->library('email');

 $config['mailtype'] = 'html';
 $config['smtp_host'] = "mail.******.com";
 $config['smtp_port'] = "25";  //465,587
 $config['smtp_user'] = "****@****.com";
 $config['smtp_pass'] = "*****";
 $config['smtp_timeout']='30';
 $config['charset']='utf-8';
 $config['protocol'] = 'smtp';
 $config['wordwrap'] = TRUE;
 $config['newline']  = "\r\n";

 $this->email->initialize($config);

---

它与您的代码无关，它与邮件服务器的配置有关！或者尝试将端口更改为587

---

您是否加载了

$this->load->library（'email'）？或者检查
smtp\u端口
as
587
我将库放在桌面上。我尝试了它，然后得到了以下错误：SSL操作失败，代码为1。OpenSSL错误消息：错误：140770FC:SSL例程：SSL23\u GET\u服务器\u HELLO:未知协议