C# SMTP authentication error 2

[akgta]

Hello,

I am getting the following SMTP Authentication error message, when I am trying to send an email using the following C# script:

Error: The server response was: 5.7.1 Unable to relay

    private void send_emails()
    {

     System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage();

        message.To.Add("recepient@test.com");
        message.Subject = "Test Subject";
        message.From = new System.Net.Mail.MailAddress("sender@test.com");
        message.Body = "Test Body";

        System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.servername.com");
  
        smtp.Send(message);
     }

So I did some search and the conclusion is that I also need to specify the smtp username and password for authentication.

How can this be achieved

Thanks in advance.

 

[AlexCuse]

Where is your app hosted?

Some hosts (probably most) will not allow smtp mails to be sent from a location other than their server. So are you trying to send the mail from the "debug" mode on localhost, or from the web server itself?

Your code may not work when you run it locally, but work just fine when deployed to your server.

Hope this helps,

Alex

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[jmeckley]

you can use the web.config to configure the user/pwd or set it in code.

http://www.systemnetmail.com

is a good resource for .net smtp

Jason Meckley
Programmer
Specialty Bakers, Inc.