在c＃中发送SMTP MAil消息时出错 [英] Error sending SMTP MAil message in c#

问题描述

我正在尝试发送消息（下面的代码），但是我收到以下错误。如果我删除Netwrok凭据部分，那么我会收到一个错误，通过身份验证的SMTP没有用户名和密码，所以我认为它可能与登录凭据有关，我可能是错的，经常是。任何帮助，将不胜感激。谢谢。

I am attempting to send a message (code below) but I get the following error. If I remove the Netwrok credentials part then i get an error that wouold be expected with authenticated SMTP without username and password, so I think that it may something to do with the logon credentials, I could be wrong and often am. Any help would be appreciated. Thanks.

我收到错误。

发生以下错误发送电子邮件：系统。 ApplicationException：
发送电子邮件时发生错误至[e-mail]
来自[e-mail] Cc主题使用Finlistener＃1进行测试。正文是：
这是对错误邮件正文的测试--->
System.Net.Mail.SmtpException：发送邮件失败。 --->
System.FormatException：Base-64 char数组的长度无效。在System.Net.N.utTutb的System.Net.NTAuthentication.GetOutgoingBlob（String incomingBlob）的System.Convert.FromBase64String（String s）

System.Net.Mail的System.Net.Mail.SmtpConnection.GetConnection（String host，Int32 port）上的.Net.Mail.SmtpNtlmAuthenticationModule.Authenticate（String
challenge，NetworkCredential credential，Object sessionCookie）
System.Net.Mail.SmtpClient.Send（MailMessage消息）上的.smtpTransport.GetConnection（String host，Int32 port）
System.Net.Mail.SmtpClient.GetConnection（）

The following error occured Sending an email: System.ApplicationException:
An error occurred sending an email To [e-mail]
From [e-mail] Cc  Subject A test with Finlistener #1. The body was:
This is test for the body of the error email --->
System.Net.Mail.SmtpException: Failure sending mail. --->
System.FormatException: Invalid length for a Base-64 char array.
   at System.Convert.FromBase64String(String s)
   at System.Net.NTAuthentication.GetOutgoingBlob(String incomingBlob)
   at System.Net.Mail.SmtpNtlmAuthenticationModule.Authenticate(String
challenge, NetworkCredential credential, Object sessionCookie)
   at System.Net.Mail.SmtpConnection.GetConnection(String host, Int32 port)
   at System.Net.Mail.SmtpTransport.GetConnection(String host, Int32 port)
   at System.Net.Mail.SmtpClient.GetConnection()
   at System.Net.Mail.SmtpClient.Send(MailMessage message)

从此代码

MailMessage Message = new MailMessage（）;
Message.To.Add（new
MailAddress（" [e-mail]"，"海伦"，System.Text.Encoding.UTF8））;
Message.Subject = Subject;
Message.SubjectEncoding = System.Text.Encoding.UTF8;
Message.From = new
MailAddress（_From，" Finlistener"，System.Text.Encoding。 UTF8）;
Message.Body = Body;
Message.BodyEncoding = System.Text.Encoding.UTF8;
Message.IsBodyHtml = false;
SmtpClient SMTP = new SmtpClient（_SMTPServer，25）;
if（_UserName！= string.Empty）
{
SMTP.Credentials = new
System.Net.NetworkCredential（_UserName，_Password）;
SMTP.DeliveryMethod = SmtpDeliveryMethod.Network; < br>}
SMTP.Send（消息）;

From this code

MailMessage Message = new MailMessage();
            Message.To.Add(new
MailAddress("[e-mail]","Helen",System.Text.Encoding.UTF8));  
            Message.Subject =  Subject;
            Message.SubjectEncoding = System.Text.Encoding.UTF8;
            Message.From = new
MailAddress(_From,"Finlistener",System.Text.Encoding.UTF8);
            Message.Body = Body;
            Message.BodyEncoding = System.Text.Encoding.UTF8;
            Message.IsBodyHtml = false;
            SmtpClient SMTP = new SmtpClient(_SMTPServer, 25);
            if (_UserName != string.Empty)
            {
                SMTP.Credentials =  new
System.Net.NetworkCredential(_UserName, _Password);
                SMTP.DeliveryMethod = SmtpDeliveryMethod.Network;
            }
            SMTP.Send(Message);
--

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