email in asp.net...help me.....

You have to add the following codes to send a mail as simple as possible...

[Example is given for gmail account.
That means you have to have one gmail account to send a mail to any address.]

string pweda = "FromMailPassword"; //(ConfigurationManager.AppSettings["password"]);
        string from = "FromYourmail@gmail.com"; //Replace this with your own correct Gmail Address
        string to = "abc@gef.com"; //Replace this with the Email Address to whom you want to send the mail
        System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();
        mail.To.Add(to);
        mail.From = new MailAddress(from);
        mail.Subject = "This is a test mail";
        mail.SubjectEncoding = System.Text.Encoding.UTF8;
        mail.Body = "Test Mail.";

        mail.Priority = MailPriority.High;
        SmtpClient client = new SmtpClient();

        //Add the Creddentials- use your own email id and password
        client.UseDefaultCredentials = false;
        client.Credentials = new System.Net.NetworkCredential(from, pweda);
        client.Port = 587; // Gmail works on this port
        client.Host = "smtp.gmail.com";
        client.EnableSsl = true; //Gmail works on Server Secured Layer

        try
        {
            client.Send(mail);
            Response.Write("Message Sent...");
        }
        catch (Exception ex)
        {
            Exception ex2 = ex;
            string errorMessage = string.Empty;
            while (ex2 != null)
            {
                errorMessage += ex2.ToString();
                ex2 = ex2.InnerException;
            }
            HttpContext.Current.Response.Write(errorMessage);
        } // end try

You can send from any mail address if you have any other...
Just replace with the credentials and port and host names which you can get easily get from google.

You can send anything by assigning value to 'mail.Body'.

Add this code where ever you want send the mail...

Happy coding........