How to Send Emails in ASP.NET C# Using SMTP?

Sending Email in ASP.NET C#

If you're new to ASP.NET and looking to send emails, understanding the sender/receiver SMTP concept is crucial. SMTP (Simple Mail Transfer Protocol) defines the rules for email transmission.

Code Sample:

Consider the following code that utilizes the correct SMTP address provided by your ISP:

using System;
using System.Net.Mail;

public partial class SendMail : System.Web.UI.Page
{
    protected void Btn_SendMail_Click(object sender, EventArgs e)
    {
        MailMessage mailObj = new MailMessage(
            txtFrom.Text, txtTo.Text, txtSubject.Text, txtBody.Text);
        SmtpClient SMTPServer = new SmtpClient("smtp-proxy.tm.net.my");

        // Replace the hardcoded credentials with your own credentials
        SMTPServer.Credentials = new System.Net.NetworkCredential("yourusername", "yourpassword");
        SMTPServer.Port = 25; // Adjust the port number according to the SMTP server's configuration (e.g., Google uses port 587)
        SMTPServer.EnableSsl = true; // This will depend on the SMTP server's security requirements

        try
        {
            SMTPServer.Send(mailObj);
        }
        catch (Exception ex)
        {
            Label1.Text = ex.ToString();
        }
    }
}

By using the correct SMTP address and port, specifying your credentials, and enabling SSL encryption if required, you can successfully send emails from your ASP.NET C# application.

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