Question

protected void Button1_Click(object sender, EventArgs e)
{
    var fromAddress = new MailAddress(fromid.Text, fromname.Text);
    var toAddress = new MailAddress(toid.Text, toname.Text);
    string fromPassword = pswd.Text;
    string subject = subjectbox.Text;
     string body = bodybox.Text;
     Attachment at = new Attachment(Server.MapPath("~/Penguins.jpg"));

    var smtp = new SmtpClient
    {
        Host = "smtp.gmail.com",
        Port = 587,
        EnableSsl = true,
        DeliveryMethod = SmtpDeliveryMethod.Network,
        Credentials = new NetworkCredential(fromAddress.Address, fromPassword),
        Timeout = 20000,

    };
    using (var message = new MailMessage(fromAddress, toAddress)
    {
        Subject = subject,
        Body = body,
        IsBodyHtml = false,


    })
    {
        message.Attachments.Add(at);
        smtp.Send(message);
    }

}

There is no error but while sending mail it takes some time and shows “Connection TimeOut” and not sending mail…:(
Can any one tell where is the problem.

Answer 1

I think your problem is with Gmail smtp server. Try this on:

                MailMessage message = new MailMessage(new MailAddress(txtSenderMail.Text, txtSenderName.Text), new MailAddress(txtToAdd.Text);
                message.IsBodyHtml = true;
                message.Subject = txtSubject.Text;
                message.Body = txtMail.Text;
                message.Priority = MailPriority.High;
                SmtpClient smtp = new SmtpClient(YOUR SMTP ADDRESS, YOUR SMTP PORT);
                smtp.EnableSsl = false;
                smtp.UseDefaultCredentials = false; //you can use this line if you have your own SMTP server if not set it **True** (also you can get server address of your internet service company. like mine is: smtp.datak.ir  but it only works on your own computer not Web server. webservers could have SMTP too.) 
                smtp.Send(message);