How to authenticate the mail in ASP.NET?

How to authenticate the mail in ASP.NET?

First, create a file named test.aspx and insert the below mentioned code.

<% @Page Language=C# CodeFile=test.aspx.cs Inherits=test %>

Mail with Authentication using ASP.NET 2.0 and C#

To
Subject
Body
Action
Status

Then create another file in the name of test.aspx.cs and then add the below placed code in the 'test.aspx.cs' file.

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net.Mail;

public partial class test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
try
{
MailMessage message = new MailMessage(, txtTo.Text, txtSubject.Text, txtBody.Text);
SmtpClient emailClient = new SmtpClient();
System.Net.NetworkCredential SMTPUserInfo = new System.Net.NetworkCredential(, );
emailClient.UseDefaultCredentials = false;emailClient.Credentials = SMTPUserInfo;emailClient.Send(message);litStatus.Text = Message Sent;
}
catch (Exception ex)
{
litStatus.Text=ex.ToString();
}
}
}

Note that in above mentioned code
replace user name with your email address for e.g. test@sitename.com,
replace password with your password,
replace sitename with your website/domain name,

Note that normally the smtp client server name is smtp.domain name, but for HIOX the smtp client server name is sitename.

How this faq is helpful: