C# Windows 窗体应用程序 - 使用 gmail smtp 发送电子邮件 [英] C# Windows Form Application - Send email using gmail smtp

问题描述

我一直在尝试创建一个通过smtp.gmail.com发送电子邮件的小程序，但它总是提示我操作已超时".我知道网上有很多解决方案，但没有一个有效.

I have been trying to create a small program to send email through smtp.gmail.com, but it always prompt me that "The operation has timed out". I know there are lots of solutions available on the net but none of it works.

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

    message.From = new MailAddress("[e-mail]");
    message.To.Add(new MailAddress("[e-mail]"));
    message.Subject = "Test";
    message.Body = "Content";

    smtp.Port = 465;
    smtp.Host = "smtp.gmail.com";
    smtp.EnableSsl = true;
    smtp.UseDefaultCredentials = false;
    smtp.Credentials = new NetworkCredential("[e-mail]", "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这个问题吗?

Is there any way to solve this?

推荐答案

将端口改为587:

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

    message.From = new MailAddress("[e-mail]");
    message.To.Add(new MailAddress("[e-mail]"));
    message.Subject = "Test";
    message.Body = "Content";

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

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