无法通过 MailMessage 对 Gmail smtp 进行身份验证smtpClient

Can#39;t auth to Gmail smtp via MailMessage amp; smtpClient(无法通过 MailMessage 对 Gmail smtp 进行身份验证smtpClient)

问题描述

我终其一生都无法弄清楚为什么这不起作用

I cannot figure out for the life of my why this isn't working

SmtpClient smtp = new SmtpClient
{
    Host = "smtp.gmail.com",
    Port = 587,
    UseDefaultCredentials = false,
    DeliveryMethod = SmtpDeliveryMethod.Network,
    Credentials = new NetworkCredential("myemail@gmail.com", "myGmailPasswordHere"),
    EnableSsl = true,
    Timeout = 10000
};


smtp.Send(mail);

我明白了:

SMTP 服务器需要安全连接或客户端未通过身份验证.服务器响应为:5.5.1 Authentication Required.

The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.

我刚刚将 EnableSsl 指定为 true，因此这不应该是安全连接方面的问题.

I just specified EnableSsl to true so that shouldn't be the issue in terms of secure connection.

我从 localhost 运行它.是的，我输入身份验证的用户名和密码(我的 gmail 帐户凭据)是 100% 正确的.

I'm running this from localhost. And yes, my username and password I'm entering to auth (my gmail account credentials) is 100% right.

推荐答案

我知道这是个老话题了，但是……谷歌已经改变了他们的安全设置.

I know this is an old topic, BUT... Google has changed something on their security settings.

我一直在为所有答案苦苦挣扎，直到我检查了我的电子邮件，并收到一封来自 Google 的邮件，其中说我们最近阻止了对您的 Google 帐户的登录尝试".

Was struggling with all the answers until I checked my email with a mail from Google stating that "we've recently blocked a sign-in attempt on your Google account".

这使我进入了这个页面:Google 帐户安全

That led me to this page: Google Account Security

在访问安全性较低的应用程序"部分下，您可以允许从其他设备/应用程序访问您的帐户...例如您的 C# 应用程序.

Under the "Access for less secure apps" section, you can enable access to your account from other devices/applications... like your C# application.

请注意，不再有特定于应用程序"的部分.

Note, there is no longer an "application specific" section.

希望这对某人有所帮助...我刚刚失去了 30 分钟的生命...

Hope this helps someone... I just lost 30 minutes of my life...

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