使用SmtpClient时“操作超时”

我正在尝试使用C＃框架创建一个小应用程序来发送电子邮件。 但是，它不起作用。 该应用程序总是给我“操作超时”。 我不是为什么。

这是我的代码：

private void button1_Click(object sender, EventArgs e) { MailAddress fromAddress = new MailAddress("[e-mail]"); MailAddress toAddress = new MailAddress("[e-mail]"); MailMessage mail = new MailMessage(fromAddress.Address, toAddress.Address); mail.Subject = "Testing"; mail.Body = "contents."; SmtpClient client = new SmtpClient(); client.Host = "smtp.gmail.com"; client.Port = 587; client.EnableSsl = true; client.Timeout = 100; client.UseDefaultCredentials = false; client.Credentials = new NetworkCredential("username", "password"); try { client.Send(mail); MessageBox.Show("Mail Sent!", "Success", MessageBoxButtons.OK); } catch (Exception ex) { MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK); } } 

谢谢！

Answer 1

尝试设置更高的超时限制。 它是以毫秒为单位。

 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Net.Mail; using System.Net; namespace GmailSendTest { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { MailAddress fromAddress = new MailAddress("[e-mail]"); MailAddress toAddress = new MailAddress("[e-mail]"); MailMessage mail = new MailMessage(fromAddress.Address, toAddress.Address); mail.Subject = "Testing"; mail.Body = "contents."; SmtpClient client = new SmtpClient(); client.Host = "smtp.gmail.com"; client.Port = 587; client.EnableSsl = true; client.Timeout = 10000; client.UseDefaultCredentials = false; client.Credentials = new NetworkCredential("myusername", "mypassword"); try { client.Send(mail); MessageBox.Show("Mail Sent!", "Success", MessageBoxButtons.OK); } catch (Exception ex) { MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK); } } } }