在C＃中发送电子邮件时如何解决“发送电子邮件异常失败”？

Question

我正在尝试使用C＃发送电子邮件（SMTP），但是“发送电子邮件失败”例外。

我在代码中启用了ssl，并使用465端口（打开的端口）通过system.net.mail库将电子邮件发送到yahoo（smtp.mail.yahoo.com）。

try
{
    string mass = " Hi this is compo team email to you for a verification code! your ver fication code is :''" + result + "'' you can enter this code to your compex for go ahead !!!";

    string frommail = "<my mail is here>";
    string tomail = emailtxt.Text;
    string submail = "verification";
    string smtptext = "smtp.mail.yahoo.com";
    string passmail = "<my email password here> ";
    MailMessage mail = new MailMessage(frommail, tomail, submail, mass);
    SmtpClient client = new SmtpClient(smtptext);
    client.Port = 465;
    client.Credentials = new System.Net.NetworkCredential(frommail, passmail);
    client.EnableSsl = true;
    client.Send(mail);
    MessageBox.Show("email sent", "log", MessageBoxButtons.OK);
    /////email
}
catch (Exception exc)
{
    MessageBox.Show(exc.Message);
}

我该如何解决？怎么了？

Answer 1

最简单的方法是使用telnet。

打开cmd并运行telnet smtp.mail.yahoo.com 465

有了答案，您将能够找到防火墙和安全性问题还是其他问题。