Question

我通过thie article配置我的outlook 2010来发送和接收来自yahoo.com的电子邮件，它没有任何问题。

我开发了一个小应用程序来通过我的应用程序发送我的电子邮件，但它给了我错误：

"unable to read data from the transport connection:an exist connection was 
 forcibly closed by the remote host."

我的代码：

  try
        {

            SmtpClient smtp = new SmtpClient("smtp.mail.yahoo.com", 465);
            smtp.UseDefaultCredentials = true;
            smtp.EnableSsl = true;
            smtp.Credentials = new System.Net.NetworkCredential("myid", "mypass");

            smtp.DeliveryMethod = SmtpDeliveryMethod.Network;

            MailMessage mailMessage = new MailMessage();
            mailMessage.From = new System.Net.Mail.MailAddress("myid@yahoo.com", "blabla");
            mailMessage.To.Add(new System.Net.Mail.MailAddress("xxx@live.com", "xxx@live.com"));
            mailMessage.Subject = "test";
            mailMessage.Body = "test";
            mailMessage.IsBodyHtml = false;

            mailMessage.SubjectEncoding = System.Text.Encoding.UTF8;
            mailMessage.BodyEncoding = System.Text.Encoding.UTF8;

            mailMessage.Priority = MailPriority.High;


            smtp.Send(mailMessage);

            Console.WriteLine("hooooooooooraaaaaaaaaaaaaaa");
            Console.ReadKey();
        }
        catch (Exception err)
        {

            Console.WriteLine(err.InnerException.Message);
            Console.ReadKey();
            return;
        }

Answer 1

From MSDN

某些SMTP服务器要求在之前对客户端进行身份验证服务器代表它发送电子邮件。此时将此属性设置为true 如果服务器请求，SmtpClient对象应该进行身份验证使用当前登录用户的默认凭据。对于客户端应用程序，这是大多数情况下的期望行为。

UseDefaultCredentials = true向SMTP服务器发送当前登录用户（即Windows用户）的凭据，而不是您定义的凭据。试试UseDefaultCredentials = false

发送电子邮件时出错yahoo smtp

1 个答案: