revisa esto
http://www.shabdar.org/send-email-us...et-csharp.html
o esto
System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();
System.Net.NetworkCredential cred = new System.Net.NetworkCredential("
[email protected]", "yourpwd");
mail.To.Add("
[email protected]");
mail.Subject = "subject";
mail.From = new System.Net.Mail.MailAddress("
[email protected]");
mail.IsBodyHtml = true;
mail.Body = "message";
System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.gmail.com");
smtp.UseDefaultCredentials = false;
smtp.EnableSsl = true;
smtp.Credentials = cred;
smtp.Port = 587;
smtp.Send(mail);