使用 SMTP 发送电子邮件不适用于 asp.net

Question

I'm trying to send email using SMTP in asp.net. Following code is not working.

public string send_email(string name, string email, string message)
{
    var fromAddress = email;
    var toAddress = "ashish_sharma307@hotmail.com";
    string subject = "Feedback";
    string body = "From: " + name+ "\n";
    body += "Email: " + email + "\n";
    body += "Subject: " + subject + "\n";
    body += "Question: \n" + message + "\n";
    // smtp settings
    var smtp = new System.Net.Mail.SmtpClient();
    {
        smtp.Host = "smtp.live.com";
        smtp.Port = 587;
    }
    smtp.Send(fromAddress, toAddress, subject, body);


    return "Your query has been submitted.";
}

This is not working as per expected. I'm trying to send an email from feedback form.

Answer 1

Putting this in an answer so it's easier to read.

In answer to your comments, here is the mail message i would send through a server with no credentials.

You can send emails from any address to anyone.

But, remember that the emails getting to where it's going is not guaranteed. mail filters will often reject emails that come from an smtp server that has not been added to the SPF record for that domain.

MailMessage m = new MailMessage();

m.From = new MailAddress("Smith@MyDomain.com");
m.To.Add(new MailAddress("someone@TheirCompany.com));
m.Subject = "Message from Smith";
m.Body = "Hello, Test Message";
SendEmail(m);

var smtp = new SmtpClient
{
Host = "localhost",
Port = 25,
UseDefaultCredentials = false,                    
};

smtp.Send(m);

This is for sending through the local machine assuming you have setup an SMTP server.

There are so many variables and options for sending emails, and each one has it's own limitations.

Options

1. Setup and run your own SMTP server
2. Use a 3rd party to send emails such as Campain Monitor - There are other providers
3. If you are sending from your company domain only, and they have Exchange email, use that server