How to send mail to godaddy office 365 email using c#

private void SendMail()
    {
        MailMessage mail = new MailMessage();

        mail.From = new MailAddress(txtEmail.Text.Trim());
        mail.To.Add("mailid");

        mail.Subject = txtSubject.Text.Trim();
        mail.IsBodyHtml = true;
        mail.Body = GetBody();

        
        SmtpClient smtpClient = new SmtpClient();
        smtpClient.Host = "relay-hosting.secureserver.net";//smtpout.secureserver.net
        smtpClient.Port = 25;
        
        smtpClient.UseDefaultCredentials = false;
        smtpClient.Credentials =
                  new NetworkCredential("mailid", "password");

        
        smtpClient.Timeout = 20000;
        smtpClient.Send(mail);
    }