发送邮件失败：C#：Gmail：无法从传输连接读取数据：现有连接被远程主机强行关闭

Question

我在使用 C# 控制台应用程序发送电子邮件时遇到错误。它之前工作得很好，但它开始给我错误，下面是我的代码

            smtp.Host = "smtp.gmail.com"; 
            smtp.Port = Convert.ToInt32(587);
            smtp.EnableSsl = true;
            smtp.UseDefaultCredentials = false;
            smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
            smtp.ServicePoint.MaxIdleTime = 60;
            smtp.Timeout = 20000;
            smtp.Credentials = new NetworkCredential(UserName, Password);

            ServicePointManager.ServerCertificateValidationCallback = delegate (object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
            { return true; };
            smtp.Send(msg);

错误

我还在 google 设置中将 'Allow Less Secure Apps' 更新为开启有人知道吗

Answer 1

我已经自行解决了这个问题。我必须授予 AD 服务帐户适当的权限，才能从地址

发送任何 SMTP

发送邮件失败：C#：Gmail：无法从传输连接读取数据：现有连接被远程主机强行关闭

Failure sending mail :C#:Gmail: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host

c#

gmail

console-application