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

只需遵循谷歌电子邮件中的步骤,启用不太安全的应用程序。

其他回答

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);
}

您可能需要从gmail创建/生成一个特定的APP密码。 您的应用程序或脚本将使用这个新密码,而不是您的常规密码。 您的常规密码仍然可以正常工作。

这对我来说很重要。 我仍然使用相同的电子邮件帐户,但必须生成一个新的应用程序特定的密码。

https://support.google.com/accounts/answer/185833?hl=en

基本上你可以在这里做: https://security.google.com/settings/security/apppasswords

下面是我的代码。我也有同样的错误,但问题是我给我的密码错误。下面的代码将完美地工作..尝试一下

            MailMessage mail = new MailMessage();
            SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");             
            mail.From = new MailAddress("fromaddress@gmail.com");
            mail.To.Add("toaddress1@gmail.com");
            mail.To.Add("toaddress2@gmail.com");
            mail.Subject = "Password Recovery ";
            mail.Body += " <html>";
            mail.Body += "<body>";
            mail.Body += "<table>";
            mail.Body += "<tr>";
            mail.Body += "<td>User Name : </td><td> HAi </td>";
            mail.Body += "</tr>";

            mail.Body += "<tr>";
            mail.Body += "<td>Password : </td><td>aaaaaaaaaa</td>";
            mail.Body += "</tr>";
            mail.Body += "</table>";
            mail.Body += "</body>";
            mail.Body += "</html>";
            mail.IsBodyHtml = true;
            SmtpServer.Port = 587;
            SmtpServer.Credentials = new System.Net.NetworkCredential("sendfrommailaddress.com", "password");
            SmtpServer.EnableSsl = true;
            SmtpServer.Send(mail);

你可以在我的博客里查阅

我尝试了这里找到的所有建议,从启用不太安全的应用程序,到尝试587端口……毫无效果。最后,我只注释掉了UseDefaultCredentials = false这一行。如果我不碰这个布尔值,一切都能正常工作。

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:-)