SMTP服务器在mailkit中意外断开连接

Question

我正在使用mailkit在Asp.net Core中发送邮件 这是我的代码

var emailMessage = new MimeMessage();

                emailMessage.From.Add(new MailboxAddress("Gorrolo", "gorollobikes@gmail.com"));
                emailMessage.To.Add(new MailboxAddress("", email));
                emailMessage.Subject = subject;
                emailMessage.Body = new TextPart("HTML") { Text = message };

                using (var client = new SmtpClient())
                {
                    client.LocalDomain = "http://localhost:54850";
                    await client.ConnectAsync("smtp.gmail.com", 465, false);
                    client.Authenticate("Myemail", "Mypassword");
                    client.Send(emailMessage);
                    //await client.emailMessage(emailMessage).ConfigureAwait(false);
                    //await client.DisconnectAsync(true).ConfigureAwait(false);
                }

在

行

await client.ConnectAsync("smtp.gmail.com", 465, false)

调试器播放以下错误 SMTP服务器意外断开连接

请提出一些可能的解决方案