C# Windows 窗体应用程序 - 使用 gmail smtp 发送电子邮件

Question

我一直在尝试创建一个小程序通过smtp.gmail.com发送邮件，但是它总是提示我“操作超时”。我知道网上有很多解决方案，但没有一个有效。

try
{
    MailMessage message = new MailMessage();
    SmtpClient smtp = new SmtpClient();

    message.From = new MailAddress("from@gmail.com");
    message.To.Add(new MailAddress("to@gmail.com"));
    message.Subject = "Test";
    message.Body = "Content";

    smtp.Port = 465;
    smtp.Host = "smtp.gmail.com";
    smtp.EnableSsl = true;
    smtp.UseDefaultCredentials = false;
    smtp.Credentials = new NetworkCredential("from@gmail.com", "pwd");
    smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
    smtp.Send(message);
}
catch (Exception ex)
{
    MessageBox.Show("err: " + ex.Message);
}

有什么办法可以解决吗？

Answer 1

将端口更改为 587:

try
{
    MailMessage message = new MailMessage();
    SmtpClient smtp = new SmtpClient();

    message.From = new MailAddress("from@gmail.com");
    message.To.Add(new MailAddress("to@gmail.com"));
    message.Subject = "Test";
    message.Body = "Content";

    smtp.Port = 587;
    smtp.Host = "smtp.gmail.com";
    smtp.EnableSsl = true;
    smtp.UseDefaultCredentials = false;
    smtp.Credentials = new NetworkCredential("from@gmail.com", "pwd");
    smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
    smtp.Send(message);
}
catch (Exception ex)
{
    MessageBox.Show("err: " + ex.Message);
}