我正在使用以下代码发送电子邮件。代码在我的本地机器上正常工作。但是在生产服务器上,我得到了错误消息

var fromAddress = new MailAddress("mymailid@gmail.com");
var fromPassword = "xxxxxx";
var toAddress = new MailAddress("yourmailid@yourdoamain.com");

string subject = "subject";
string body = "body";

System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient
{
    Host = "smtp.gmail.com",
    Port = 587,
    EnableSsl = true,
    DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network,
    UseDefaultCredentials = false,
    Credentials = new NetworkCredential(fromAddress.Address, fromPassword)       
};

using (var message = new MailMessage(fromAddress, toAddress)
{
    Subject = subject,
    Body = body
})

smtp.Send(message);

在我的Gmail A/c上,我从生产服务器运行代码后收到了以下电子邮件

Hi , Someone recently used your password to try to sign in to your Google Account mymailid@gmail.com. This person was using an application such as an email, client or mobile device. We prevented the sign-in attempt in case this was a hijacker trying to access your account. Please review the details of the sign-in attempt: Friday, 3 January 2014 13:56:08 o'clock UTC IP Address: xxx.xx.xx.xxx (abcd.net.) Location: Philadelphia PA, Philadelphia, PA, USA If you do not recognise this sign-in attempt, someone else might be trying to access your account. You should sign in to your account and reset your password immediately. Reset password If this was you and you are having trouble accessing your account, complete the troubleshooting steps listed at http://support.google.com/mail?p=client_login Yours sincerely, The Google Accounts team


当前回答

尝试改变主机,这是一个新的,我得到了这个配置mozilla雷鸟

Host = "smtp.googlemail.com"

这对我很有用

其他回答

我也遇到过同样的问题。当您打开2步验证(MFA)时,就会发生这种情况。 只要关闭2步验证,你的问题就解决了。

不要在等待smtp.SendMailAsync(邮件)前设置断点;

:)

当它等待一个断点给出这个错误时,当我删除断点时,它已经工作了

2018年11月,我尝试了以上所有方法,但都没有成功。

下面是最终有效的解决方案。不幸的是,它不使用SSL,但它工作!!

var fromAddress = new MailAddress(asd@asd.com, "From Name");
var toAddress = new MailAddress("tosend@asd.com", "To Name");

const string subject = "Subject";
const string body = "Body";

var smtp = new SmtpClient
{
    Host = "aspmx.l.google.com",
    Port = 25,
    EnableSsl = false
};
using (var message = new MailMessage(fromAddress, toAddress)
{
    Subject = subject,
    Body = body
})
{
    smtp.Send(message);
}

嗨,我也有同样的问题,

我是怎么解决它的。就是打开不太安全的应用。 在连接到我的gmail帐户后。我输入了这个链接:https://www.google.com/settings/security/lesssecureapps

然后我打开安全应用程序,它就工作了。 上面也说过

因此,正如其他人所说的那样,自5月30日起,谷歌不再支持使用第三方应用程序访问该帐户。

为了能够从我的代码访问帐户,我必须做的是首先启用两步验证。

一旦这样做,我创建了一个应用程序密码。

然后我将生成的密码替换为我用来访问我的帐户的密码。换句话说,你需要用这个新的应用程序密码删除gmail帐户密码(我们用来登录gmail的密码),功能就重新上线了!

我希望这能帮助到一些人:-)