Member Avatar for codechrysalis 
                  private void btnSend_Click_1(object sender, EventArgs e)
        {

             To = txtPhoneNumber.Text.Trim() + cboCarrier.SelectedItem.ToString().Trim();
             From = txtSender.Text.Trim();
             Subject = txtSubject.Text.Trim();
             MailServer = txtMailServer.Text.Trim();
             Msg = txtMessage.Text.Trim();


             try
             {
                 MailMessage message = new MailMessage(From, To, Subject, Msg);
                 SmtpClient mySmtpClient = new SmtpClient(MailServer);
                 mySmtpClient.UseDefaultCredentials = true;
                 mySmtpClient.Send(message);
                 MessageBox.Show("Message has been sent to " + message.To.ToString(), "Mail", MessageBoxButtons.OK, MessageBoxIcon.Information);
             }

It seems this is the event that is causing the issue , but I dont know why here is the exception I get from Windows when I click "send" :

http://i.imgur.com/ZBUhk.png

Edited by codechrysalis because: the Img tags were showing incorrectly
  • 2 Contributors
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  • Latest Post Latest Post by codechrysalis
Member Avatar for Momerath

Do you have a mail server listening on port 25 of whatever machine 'MailServer' is?

Member Avatar for codechrysalis

no i havent even configured that and the MailServer is the machine im developing it on . But what exactly is the problem and why is that exception popping up? I thought sending a mail would not require credentials mainly because its being bounced on the server (in my knowledge)

Member Avatar for Momerath

To send mail it needs to connect to a mail server. You've told it that your machine is a mail server and to send the mail there. Since you have no mail service running, it can't connect to it and you get the error.

Member Avatar for codechrysalis

so is there code to signify to tell the program to bounce off another server(probably look online or should I still use smtp server from gmail or even a generic one) . Since the problem is the program does not have a mail server to send the message to?

Thanks

Member Avatar for codechrysalis

if I just find a free public smtp server will it do the trick because it could also be that my ISP is blocking connections to port 25 to other services unless it is its own smtp server.

Member Avatar for Momerath

It should, yes

Member Avatar for codechrysalis 
 try
             {
                 MailMessage message = new MailMessage(mFrom, mTo, mSubject, mMsg);
                 SmtpClient smtpClient = new SmtpClient("smtp.gmail.com", 25);
                 System.Net.NetworkCredential credentials = new System.Net.NetworkCredential("mail@gmail.com", "password");
                 //smtpClient.Send(message);
                // smtpClient.UseDefaultCredentials = false;
                 //smtpClient.Credentials = credentials;

                 SmtpClient mySmtpClient = new SmtpClient(mMailServer);
                 mySmtpClient.UseDefaultCredentials = false;
                 mySmtpClient.Send(message);
                 MessageBox.Show("Message has been sent to " + message.To.ToString(), "Mail", MessageBoxButtons.OK, MessageBoxIcon.Information);
             }

This is what I have implemented so far . I have told the system to get auth and even where to refer to a smtp client and its port but again another issue arises http://i.imgur.com/rLTqI.png

Edited by codechrysalis
Member Avatar for codechrysalis

Nevermind I solved it by finding out that you have to use your ISP's own smtp server

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