c# - SmtpClient - 操作超时

Question

我正在尝试使用 C# 创建一个小型应用程序来发送电子邮件，但即使使用端口 587 (GMail) TLS 或 465 (GMail SSL) 我也无法让它工作。我不确定是什么导致了我的问题，我应该编辑我的 app.config 文件吗？这是我的代码:

try
{
  SmtpClient client = new SmtpClient("smtp.gmail.com", 465);
  client.EnableSsl = true;
  client.Timeout = 10000;
  client.DeliveryMethod = SmtpDeliveryMethod.Network;
  client.UseDefaultCredentials = false;
  client.Credentials = new NetworkCredential("myemailid", "mypwd");

  MailMessage msg = new MailMessage();
  msg.To.Add(txtTo.Text);
  msg.From = new MailAddress("myemailid");
  msg.Subject = txtSub.Text;
  msg.Body = txtMsg.Text;

  client.Send(msg);
  MessageBox.Show("sent");
}
catch (Exception ex) 
{
    MessageBox.Show(ex.Message);
}

Answer 1

端口 25 和 465 导致了问题。将端口更改为 587 对我有用。

Dim myCredential As System.Net.NetworkCredential
myCredential = New System.Net.NetworkCredential("emailid", "pwd")
smtp.Host = "server"
smtp.Port = 587
smtp.EnableSsl = True
smtp.UseDefaultCredentials = False
smtp.Credentials = myCredential
smtp.Send(mm)