用C发送邮件＃

Question

尽管在Stackoverflow上有关于此的所有主题。我不能设法找到这一问题的解决方案：

我有这样的例外：

SMTP服务器需要安全连接或客户端是不是 authentificated。服务器的回复是：5.5.1认证 必需。了解更多信息，使用此代码

：

var fromAddress = new MailAddress(user.Email, "From Name"); 
    var toAddress = new MailAddress("myadress@gmail.com", "To Name"); 
    const string fromPassword = "fromPassword"; 
    const string subject = "Subject"; 
    const string body = "Body"; 

    var smtp = new SmtpClient 
    { 
     Host = "smtp.gmail.com", 
     Port = 587, 
     EnableSsl = true, 
     DeliveryMethod = SmtpDeliveryMethod.Network, 
     UseDefaultCredentials = false, 
     Credentials = new NetworkCredential(fromAddress.Address, fromPassword), 
     Timeout = 20000 
    }; 
    using (var message = new MailMessage(fromAddress, toAddress) 
    { 
     Subject = subject, 
     Body = body 
    }) 
    { 
     smtp.Send(message); 
    } 

我在想什么吗？ 感谢您的帮助

Answer 1

你不会错过任何东西。我怀疑你的密码错了。你不忘记把它从“密码”改为它真的应该是你？

This is a cleaner implementation of the same task

Answer 2

此代码为我工作

SmtpClient sc = new SmtpClient("smtp.gmail.com"); 
    NetworkCredential nc = new NetworkCredential("username","password"); 
    //username doesn't include @gmail.com   
    sc.UseDefaultCredentials = false; 
    sc.Credentials = nc; 
    sc.EnableSsl = true; 
    sc.Port = 587; 
    try 
     { 
     sc.Send(mm); 
     } 
    catch (Exception ex) 
     { 
     EventLog.WriteEntry("Error Sending", EventLogEntryType.Error); 
     } 

Answer 3

或者您已输入错误的密码或（更可能），你要使用你的正常的密码，您已经启用了谷歌的2-Step Authentication

后

您需要生成并使用一个application specific password