SENDING MAIL USING C#
email.aspx
    
email.aspx.cs 
 
email.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="email.aspx.cs" Inherits="email" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD
XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <table >
    <tr><td><asp:Label ID="labto" runat="server" Text="To"></asp:Label></td><td>:</td><td><asp:TextBox ID="txtto" runat="server" ></asp:TextBox></td></tr>
    <tr><td><asp:Label ID="labsub" runat="server" Text="Sub"></asp:Label></td><td>:</td><td><asp:TextBox ID="txtsub" runat="server" ></asp:TextBox></td></tr>
    <tr><td><asp:Label ID="labmsg" runat="server" Text="Message"></asp:Label></td><td>:</td><td><asp:TextBox ID="txtmsg" runat="server" ></asp:TextBox></td></tr>
    </table>
    </div>
    <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
    </form>
</body>
</html>
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
System.Net;
using
System.Net.Mail;
public partial class email : System.Web.UI.Page
{
    protected void Page_Load(object
sender, EventArgs e)
    {
    }
    protected void Button1_Click(object
sender, EventArgs e)
    {
        string
uname = "//Your mail address//";
        string
pwd = "//Your Password//";
        string
sub = txtmsg.Text.ToString();
        string
lalmail = txtto.Text.ToString();
        //string
candi_uname = name.Text + Session["id"].ToString();
        //string
candi_pwd = name.Text + fname.Text;
        string
msg = txtmsg.Text.ToString();
        if
(SendMail(uname, pwd, lalmail, sub, msg))
        {
        }
    }
    public static bool SendMail(string gMailAccount, string
password, string to, string
subject, string message)
    {
        NetworkCredential
loginInfo = new NetworkCredential(gMailAccount,
password);
        MailMessage
msg = new MailMessage();
        msg.From = new
MailAddress(gMailAccount);
        msg.To.Add(new
MailAddress(to));
        msg.Subject = subject;
        msg.Body = message;
        msg.IsBodyHtml = true;
        SmtpClient
client = new SmtpClient("smtp.gmail.com");
        client.EnableSsl = true;
        client.UseDefaultCredentials = false;
        client.Credentials = loginInfo;
        client.Send(msg);
        return true;
    }
}
Download Source Code:sendingemail
