c# ile Office 365 mail gönderimi

        private void SendEmail()
        {
            string subject = "Email Subject";
            string body = "Email body";
            string FromMail = "a@pythontr.com";
            string emailTo = "a@pythontr.com";
            MailMessage mail = new MailMessage();
            SmtpClient SmtpServer = new SmtpClient("domain-com-tr.mail.protection.outlook.com");
            mail.From = new MailAddress(FromMail);
            mail.To.Add(emailTo);
            mail.Subject = subject;
            mail.Body = body;
            SmtpServer.Port = 25;
            // SmtpServer.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
            SmtpServer.Credentials = new System.Net.NetworkCredential("a@pythontr.com", "*****", "pythontr.com");
            SmtpServer.EnableSsl = true;
            // SmtpServer.UseDefaultCredentials = false;
            SmtpServer.Send(mail);
        }