Question

I have mvc web app sending an email when new user gets created with following code:

private static void SendMail(User user)
        {
            string ActivationLink = "http://localhost/Account/Activate/" +
                                     user.UserName + "/" + user.NewEmailKey;

            var message = new MailMessage("[e-mail]", user.Email)
            {
                Subject = "Activate your account",
                Body = ActivationLink
            };

            var client = new SmtpClient("localhost");
            client.UseDefaultCredentials = false;
            client.Send(message);
        }

What’s wrong with my code please tell me.

ERROR : Failure sending mail. {“Unable to connect to the remote server”}

Smtp configuration :

Answer 1

Here are the likely causes of this error:

1 You are not supplying the correct authentication details

2 The port is blocked, for example by a firewall

In your example, I notice you are not specifying the port when you create your SmtpClient – it may help to specify it.