Я пытаюсь отправить электронное письмо администратору в .NET core, но это вызывает исключение.

---

'A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond'

SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

Что я уже пробовал:

public void EmailtoAdmin()
        {
            var message =  new  MimeMessage();
            message.From.Add(new MailboxAddress("my email"));
            message.To.Add(new MailboxAddress("email"));
            message.Subject = "";
            message.Body = new TextPart("plian")
            {
                Text = "abc"
            };
            using (var client =new SmtpClient())
            {
               // client.Timeout = 600000;
                client.Connect("smtp.gmail.com", 465, false);
                client.Authenticate("email", "pwd");
                client.Send(message);
                client.Disconnect(true);
               
            }
        }

---