c# – 无法使用SmtpClient发送邮件

2024年1月27日 137次阅读

我想使用SmtpClient类发送邮件,但它不起作用.

码：

SmtpClient smtpClient = new SmtpClient();

smtpClient.UseDefaultCredentials = false;
smtpClient.Credentials = new System.Net.NetworkCredential(obMailSetting.UserName, obMailSetting.Password);

smtpClient.Host = obMailSetting.HostMail;
smtpClient.Port = obMailSetting.Port;
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
smtpClient.EnableSsl = obMailSetting.Connect_Security;//true
//smtpClient.UseDefaultCredentials = true;//It would work if i uncomment this line
smtpClient.Send(email);

它引发了一个异常：

The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.1 Client was not authenticated

我确定用户名和密码是正确的.我的代码有问题吗？
谢谢.

最佳答案 你可以试试这个：

 MailMessage mail = new MailMessage();
 mail.Subject = "Your Subject";
 mail.From = new MailAddress("senderMailAddress");
 mail.To.Add("ReceiverMailAddress");
 mail.Body = "Hello! your mail content goes here...";
 mail.IsBodyHtml = true;

 SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
 smtp.EnableSsl = true;
 NetworkCredential netCre = 
                  new NetworkCredential("SenderMailAddress","SenderPassword" );
 smtp.Credentials = netCre;

 try
  {
     smtp.Send(mail);                
  }
  catch (Exception ex)
  {   
    // Handle exception here 
  }

你可以试试this：
在Exchange管理控制台的“服务器配置”节点下,选择“集线器传输”和服务器的名称.在“接收连接器”窗格中,打开任一个Recive连接器(我的默认安装创建2),或者您可以为TFS创建一个新的连接器(我也试过这个并且它工作正常).对于任何这些连接器,请打开“属性”,然后在“权限组”选项卡上确保选中“匿名用户”(默认情况下不是这样).
要么
您也可以通过初始化SmtpClient尝试this,如下所示：

SmtpClient smtp = new SmtpClient("127.0.0.1");
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