C#

private void btnSend_Click(object sender, EventArgs e)
{
    this.Cursor = Cursors.WaitCursor;

    txtEmail.Enabled = false;
    txtMessage.Enabled = false;
    btnSend.Enabled = false;
    btnClose.Enabled = false;

    if (radioSuggestion.Checked == true)
        email_subject = "Suggestion from (My System) user";
    else if (radioBug.Checked == true)
        email_subject = "Bug Reported by (My System) user";
    else
        email_subject = "Email from (My System) user";

    if (SendMail("myGmailAccount@gmail.com", "xxxxxxxxx", txtEmail.Text, "myHotMailAccount@hotmail.com", email_subject, txtMessage.Text))
    {
        MessageBox.Show("Message Sent.", "Email", MessageBoxButtons.OK, MessageBoxIcon.Information);
        this.Cursor = Cursors.Default;
        this.Close();
    }
    else
    {
        MessageBox.Show("unable to send your email!!", "Email", MessageBoxButtons.OK, MessageBoxIcon.Error);
        txtEmail.Enabled = true;
        txtMessage.Enabled = true;
        btnSend.Enabled = true;
        btnClose.Enabled = true;
        this.Cursor = Cursors.Default;
        return;
    }
}



public static bool SendMail(string gMailAccount, string password, string from, string to, string subject, string message)
{
    try
    {
        NetworkCredential loginInfo = new NetworkCredential(gMailAccount, password);
        MailMessage msg = new MailMessage();
        msg.From = new MailAddress(from);
        msg.To.Add(new MailAddress(to));
        msg.Subject = subject;
        msg.Body = message;
        msg.IsBodyHtml = true;
        SmtpClient client = new SmtpClient("smtp.gmail.com");
        client.EnableSsl = true;
        client.UseDefaultCredentials = false;
        client.Credentials = loginInfo;
        client.Send(msg);

        return true;
    }
    catch (Exception)
    {
        return false;
    }

}