5.7.57 SMTP - 在 MAIL FROM 错误期间，客户端未通过身份验证发送匿名邮件

5.7.57 SMTP - Client was not authenticated to send anonymous mail during MAIL FROM error(5.7.57 SMTP - 在 MAIL FROM 错误期间，客户端未通过身份验证发送匿名邮件)

问题描述

我必须使用我的网络应用程序发送邮件.鉴于以下代码显示 SMTP 服务器需要安全连接或客户端未通过身份验证.服务器响应是:

I have to send mails using my web application. Given the below code showing The SMTP server requires a secure connection or the client was not authenticated. The server response was:

5.7.57 SMTP；在 MAIL FROM 期间，客户端未通过身份验证发送匿名邮件.

5.7.57 SMTP; Client was not authenticated to send anonymous mail during MAIL FROM.

帮助我找到合适的解决方案.谢谢.

Help me to find a proper solution. Thank you.

代码:

protected void btnsubmit_Click(object sender, EventArgs e)
 {

   Ticket_MailTableAdapters.tbl_TicketTableAdapter tc;
   tc = new Ticket_MailTableAdapters.tbl_TicketTableAdapter();
   DataTable dt = new DataTable();
   dt = tc.GetEmail(dpl_cate.SelectedValue);
   foreach (DataRow row in dt.Rows)
    {
    string eml = (row["Emp_Email"].ToString());
    var fromAddress = "emailAddress";
    var toAddress = eml;
    const string fromPassword = "*****";
    string body = "Welcome..";
 // smtp settings
    var smtp = new System.Net.Mail.SmtpClient();
       {
         smtp.Host = "smtp.office365.com";
         smtp.Port = 587;
         smtp.EnableSsl = true;

         smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
         smtp.Credentials = new NetworkCredential(fromAddress, fromPassword);
         smtp.UseDefaultCredentials = false;
         smtp.Timeout = 600000;
       }
  // Passing values to smtp object
     smtp.Send(fromAddress, toAddress, subject, body);
     }
  } 
 }

推荐答案

您似乎将 From 地址作为 emailAddress 传递，这不是正确的电子邮件地址.对于 Office365，From 需要是 Office365 系统上的真实地址.

You seem to be passing the From address as emailAddress, which is not a proper email address. For Office365 the From needs to be a real address on the Office365 system.

如果您将电子邮件地址硬编码为 From 和 Office 365 密码，则可以验证这一点.

You can validate that if you hardcode your email address as the From and your Office 365 password.

当然不要把它留在那里.

Don't leave it there though of course.

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