System.Net.Mail namespace in .NET framework helps to send email from asp.net.
private static void SendEmail(MailAddress fromAddress, MailAddress toAddress, string subject, string body)
{
var message = new MailMessage(fromAddress, toAddress)
{
Subject = subject,
Body = body
};
var client = new SmtpClient("smtpServerName");
client.Send(message);
}