如何使用SMTP邮件配置发送邮件。 [英] How to sent mail using SMTP mail config.?

问题描述

以下错误

below error is shown when sent the mail

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

我尝试过：



我使用下面的代码来发送邮件配置.thats适用于其他应用程序但我的应用程序显示以下错误如何解决它。

What I have tried:

I use below code to mail config .thats works in other applications but my application shows the below error how to fix it.

Msg.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient();
smtp.Host = ConfigurationManager.AppSettings["MailServer"];
System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();
Msg.From = new MailAddress(ConfigurationManager.AppSettings["MailFrom"]);
NetworkCred.Password = ConfigurationManager.AppSettings["MailPassword"];
smtp.Credentials = NetworkCred;
smtp.Port = 25;
smtp.EnableSsl = true;

ServicePointManager.ServerCertificateValidationCallback = delegate(object s, System.Security.Cryptography.X509Certificates.X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
return true;
};

smtp.Send(Msg);

推荐答案

你设置了 NetworkCred.Password ，但不是 NetworkCred.UserName 。大多数服务器都需要用户名和密码进行身份验证。



但还有更好的方法：将配置放在< SMTP>元素（网络设置） [ ^ ]：

You've set the NetworkCred.Password, but not the NetworkCred.UserName. Most servers will require both a username and a password for authentication.

But there's a better way: put your configuration in the <smtp> Element (Network Settings)[^]:

<configuration>  
  <system.net>  
    <mailSettings>  
      <smtp deliveryMethod="network" from="[e-mail]">  
        <network  

          host="smtp.gmail.com"

          port="587"

          enableSsl="true"

          defaultCredentials="false" 

          userName="YOUR-USER-NAME" 

          password="YOUR-PASSWORD"

        />  
      </smtp>  
    </mailSettings>  
  </system.net>  
</configuration> 

有了这个，你不需要配置 SmtpClient ;默认构造函数将自动从配置文件中读取设置。

With that in place, you don't need to configure the SmtpClient; the default constructor will automatically read the settings from the config file.

SmtpClient smtp = new SmtpClient();
smtp.Send(Msg);

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