Google Mail SMTP Issues

MailMessage mail = new MailMessage();
mail.To.Add("ToOther@gmail.com");
mail.From = new MailAddress("testfrom@gmail.com");
mail.Subject = "subj";

mail.Body = "Hi, this mail is to test sending mail using Gmail in ASP.NET";

mail.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com"; //Or Your SMTP Server Address
smtp.Credentials = new System.Net.NetworkCredential
     ("jxxxxx@gmail.com", "Yzzzzzz");

smtp.EnableSsl = true;
smtp.Send(mail);