Με τον παρακάτω κώδικα προσπαθώ να κάνω αποστολή mail από ASP εφαρμογή μoupublic static void SendGmail(string userName, string password,string mailFrom,  string mailTo, string commaDelimCCs, string subject, string message, bool isBodyHtml)
    {
            System.Net.Mail.MailMessage msg = new        System.Net.Mail.MailMessage(mailFrom, mailTo,            subject, message);
            msg.IsBodyHtml = isBodyHtml;
            if (commaDelimCCs != "")                msg.CC.Add(commaDelimCCs);
            System.Net.NetworkCredential cred = new
            System.Net.NetworkCredential(userName, password);
            System.Net.Mail.SmtpClient mailClient = new
            System.Net.Mail.SmtpClient("smtp.gmail.com", 587);
            mailClient.EnableSsl = true;
            //mailClient.UseDefaultCredentials = false;
            mailClient.Credentials = cred;
            mailClient.Send(msg);
    }