send email asynchronously from C#

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I am trying to send mail email asynchronously from c#, but there is not giving error and also not sending email to the given mail id. Here what I am using code :-

In this code when I send simple mail it works fine.

C#

public void SendMailAccro(int SlNo, string EmailId, string Body)
      {

          MailMessage mail = new MailMessage();
          mail.From = new MailAddress("_____________", "___________", System.Text.Encoding.UTF8);
          mail.To.Add(EmailId);
          mail.Subject = "VOTING DETAILS";
          mail.Body = Body;
          mail.Priority = MailPriority.Normal;
          mail.ReplyTo = new MailAddress("___________", "___________", System.Text.Encoding.UTF8);

          slno = SlNo;
          mail.IsBodyHtml = true;
          SmtpClient smtp = new SmtpClient();

          smtp.Host = "__________________";
          //smtp.EnableSsl = true;
          System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();
          NetworkCred.UserName = "_______";
          NetworkCred.Password = "_______";
          //smtp.UseDefaultCredentials = true;
          smtp.Credentials = NetworkCred;
          smtp.Port = "___"
          Object state = mail;

          smtp.SendCompleted += new SendCompletedEventHandler(smtpClient_SendCompleted);
          try
          {
              smtp.SendAsync(mail, "Name");
          }
          catch (SmtpException ex)
          {
              Console.WriteLine(ex.Message);
          }
          finally
          {
              mail.Dispose();
          }
      }
      void smtpClient_SendCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
      {
          MailMessage mail = e.UserState as MailMessage;
          if (!e.Cancelled && e.Error != null)
          {

              //message.Text = "Mail sent successfully";
          }
      }

Posted 2-Dec-12 23:03pm

rupeshsha8452

Updated 6-Mar-17 1:13am

Krunal Rohit

v2

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Comments

Pascal-78 3-Dec-12 5:27am

Have you tried to dispose the mail object only in the SendCompleted event ? (or not disposed it)
you may exit the SendAsync function and dispose the mail object before it is used by the smtp object.

2 solutions

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Mendor81 · Answer 1 · 2012-12-03T00:28:00

I developed a email sender for my company that can send both async and as i say fire and forget method. We send it through the exchange server. checking the lines of your code, the only difference i can find is that i define:

C#

Properties.Settings settings = new DBPROG.Properties.Settings(); 
//to get our server settings


SmtpClient client = new SmtpClient(settings.smtp_server,settings.smtp_port);
client.DeliveryMethod = SmtpDeliveryMethod.Network; 

.....


if (securesent)
{
    client.SendCompleted += new SendCompletedEventHandler(MailDeliveryComplete);
    client.SendAsync(mail, mail.To[0].ToString());
}
else
{
    client.Send(mail);
    CreateLogFiles SendLog = new CreateLogFiles();
    SendLog.ErrorLog("C:\\","\t|Mail sended (Subject): "+mail.Subject.ToString()
                                    + " \t|TO: " + mail.To.ToString()
                                    + " \t|FROM: " + mail.From.ToString()
                                    + " \t|REPLYTO: " + mail.ReplyToList[0].ToString()                                   
                                    , "UNSECURE_SENDLOG", true);
}

rupeshsha8452 · Answer 2 · 2012-12-03T01:26:00

Solution 2

This code is not giving error. But email not received given email id.

Posted 3-Dec-12 1:26am