smtp.send方法拋出異常

我使用的.NET版本3.5發送郵件，雖然我的web應用程序smtp.send方法拋出異常

我得到以下錯誤：

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

可能是什麼造成的？

來源

2011-05-20 kumar

來源從這裏http://www.systemnetmail.com/faq/4.2.aspx

//create the mail message 
MailMessage mail = new MailMessage(); 

//set the addresses 
mail.From = new MailAddress("[email protected]"); 
mail.To.Add("[email protected]"); 

//set the content 
mail.Subject = "This is an email"; 
mail.Body = "this is the body content of the email."; 

//send the message 
SmtpClient smtp = new SmtpClient("127.0.0.1"); 

//to authenticate we set the username and password properites on the SmtpClient 
smtp.Credentials = new NetworkCredential("username", "secret"); 
smtp.Send(mail);

編輯：此錯誤意味着什麼它寫成：SMTP服務器需要身份驗證信息（用戶名和密碼）。所以，你需要設置SmtpClient.Credentials。

來源

2011-05-20 11:03:14 VikciaR

你有沒有考慮增加一個故事，解釋的錯誤是什麼認證？ – forsvarir 2011-05-20 11:05:46

此代碼是否需要web.config中的任何更改 – kumar 2011-05-20 11:06:30

您使用交換服務器發送郵件嗎？ – 2011-05-20 11:06:36

嘗試：

smtpclient.EnableSsl = true;

來源

2011-05-20 11:07:40 leppie

iths現在提供此錯誤：根據驗證過程，遠程證書無效。 – kumar 2011-05-20 11:10:55

@kumar檢查了這[黑客]（http://stackoverflow.com/questions/777607/the-remote-certificate-is-invalid-according-to-the-validation-procedure-plea） – V4Vendetta 2011-05-20 11:36:48

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

，所以你需要通過添加證書

smtpClient.Credentials = new NetworkCredential("username", "password");

來源

2011-05-20 11:11:30 Yaur

然後憑據你提供的可能無效。 – Yaur 2011-05-20 11:18:59

smtp.send方法拋出異常

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