C#发送邮件失败 [英] C# sending mails failed

问题描述

大家好，
我试图弄清楚我的项目突然发生了什么.它工作正常，但现在不行了.
这是堆栈跟踪

Hi All,
I am trying to figure out what suddenly happened to my project. It was working fine but now its not.
this is stack trace

   at System.Net.Mail.SmtpClient.Send(MailMessage message)
   at WindowsKeyloggerTool.frmSettings.SendTestMail(String message) in c:\users\avinash\documents\visual studio 2010\Projects\WindowsKeyloggerTool\WindowsKeyloggerTool\frmSettings.cs:line 103
   at WindowsKeyloggerTool.frmSettings.ValidateUserCredentials() in c:\users\avinash\documents\visual studio 2010\Projects\WindowsKeyloggerTool\WindowsKeyloggerTool\frmSettings.cs:line 75
and inner exception
Unable to find an entry point named ''EnumerateSecurityPackagesW'' in DLL ''security.dll''.
   at System.Net.UnsafeNclNativeMethods.SafeNetHandles_SECURITY.EnumerateSecurityPackagesW(Int32& pkgnum, SafeFreeContextBuffer_SECURITY& handle)
   at System.Net.SafeFreeContextBuffer.EnumeratePackages(SecurDll Dll, Int32& pkgnum, SafeFreeContextBuffer& pkgArray)
   at System.Net.SSPISecureChannelType.EnumerateSecurityPackages(Int32& pkgnum, SafeFreeContextBuffer& pkgArray)
   at System.Net.SSPIWrapper.EnumerateSecurityPackages(SSPIInterface SecModule)
   at 

请帮助我.

Please help me.

推荐答案

您如何尝试这个.....

首先检查连接...

How about you try this.....

first check connection...

public bool Checking_Internet_Connection()
      {
          try
          {

              System.Net.Sockets.TcpClient clnt = new System.Net.Sockets.TcpClient("www.google.com", 80);

              clnt.Close();

              return true;

          }

然后将邮件发送到所需的电子邮件地址....

then send message to required email address....

public void Send_Email(Email_Message_Details Email_msg_details)
      {
          try
          {
              MailMessage mail = new MailMessage();
              SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
              mail.From = new MailAddress("gmailaccount");
              mail.To.Add("email address you want to send");
              mail.Subject = Email_msg_details.SUBJECT;
              mail.Body = Email_msg_details.BODYMESSAGE;

              SmtpServer.Port = 587;
              SmtpServer.Credentials = new System.Net.NetworkCredential("gmailaccount", "password");
              SmtpServer.EnableSsl = true;
              SmtpServer.Send(mail);
          }
          catch
          {
              return;
          }
      }

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