使用asp.net和c#发送电子邮件到Gmail帐户进行激活

本文关键字：Gmail 激活 电子邮件 net asp 使用 | 更新日期: 2023-09-27 18:05:04

我是c#的新手，并开始学习我试着发送谷歌邮件，它抛出这个错误请帮助我完成我的工作

(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。点击

了解更多信息
using (MailMessage mm = new MailMessage("sender@gmail.com", txtEmail.Text))
    {
        mm.Subject = "Account Activation";
        string body = "Hello " + txtUsername.Text.Trim() + ",";
        body += "<br /><br />Please click the following link to activate your account";
        body += "<br /><a href = '" + Request.Url.AbsoluteUri.Replace("CS.aspx", "CS_Activation.aspx?ActivationCode=" + activationCode) + "'>Click here to activate your account.</a>";
        body += "<br /><br />Thanks";
        mm.Body = body;
        mm.IsBodyHtml = true;
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.EnableSsl = true;
        NetworkCredential NetworkCred = new NetworkCredential("sender@gmail.com", "<password>");
        smtp.UseDefaultCredentials = true;
        smtp.Credentials = NetworkCred;
        smtp.Port = 587;
        smtp.Send(mm);
    }

使用asp.net和c#发送电子邮件到Gmail帐户进行激活

To Send email using Gmail server we need to set following thing.Use these namespaces in C#.

     1. using System.IO;
     2. using System.Net;
     3. using System.Net.Mail;
MailMessage Class Properties
Following are the required properties of the MailMessage class.
 - From – Sender’s email address 
 - To – Recipient(s) Email Address 
 - CC –Carbon Copies (if any) 
 - BCC – Blind Carbon Copies (if any) 
 - subject –Subject of the Email  
 - Body – Body of the Email 
 - IsBodyHtml – Specify whether body contains text or HTML tag.
 - Attachments – Attachments(if any)
 - ReplyTo – ReplyTo Email address.
 SMTP Class Properties
  Following are the properties of the SMTP class.
  - Host – SMTP Server URL (Gmail: smtp.gmail.com)
  - EnableSsl – Specify whether your host accepts SSL Connections (Gmail: True)
  - UseDefaultCredentials – Set to True in order to allow authentication based on the Credentials of the Account used to send emails
  - Credentials – Input valid username and password
  - Port – Assign port number for (Gmail: 587)
Finally here is your Code.  
       using (MailMessage mm = new MailMessage(from, to))
        {
            mm.Subject = "Account Activation";
            string body = "Hello " + your username.Trim() + ",";
            body += "<br /><br />Please click the following link to activate your account";
            body += "<br /><a href = '" + new Uri("http://www.google.com", true).AbsoluteUri + "<a>Click here to activate your account.</a>";
            body += "<br /><br />Thanks";
            mm.Body = body;
            mm.IsBodyHtml = true;
            SmtpClient smtp = new SmtpClient();
            smtp.Host = "smtp.gmail.com";
            smtp.EnableSsl = true;
            NetworkCredential NetworkCred = new NetworkCredential(username, password);
            smtp.UseDefaultCredentials = true;
            smtp.Credentials = NetworkCred;
            smtp.Port = 587;
            smtp.Send(mm);
        }

如果你得到这样的错误:-

- SMTP服务器需要一个安全连接或客户端未被认证。服务器响应为:5.5.1 Authentication Required。

则执行以下步骤:-点击下面的链接。——https://www.google.com/settings/security/lesssecureapps

点击单选按钮打开。

It will work.

测试

代码。谢谢. .

与gmail是正确的设置EnableSSL为true和设置端口为587，因为SmtpClient类不与端口465工作。请看这篇文章http://www.codeproject.com/KB/IP/GmailSmtp.aspx?q=SmtpClient+ssl+yahoo我认为问题出在smtp上。UseDefaultCredentials = true。尝试删除这一行。

嗨。

你应该收到一封来自谷歌的电子邮件，声明他们已经阻止了一个不太安全的应用程序的访问。

你需要设置UseDefaultCredentials = false，并且需要允许从https://www.google.com/settings/security/lesssecureapps?rfn=27&rfnc=1&asae=2&anexp=lbe3-R2_C访问不太安全的应用

我已经这样做了，我的应用程序能够使用gmail发送电子邮件。

您正在定义gmail帐户的登录凭据:

NetworkCredential NetworkCred = new NetworkCredential("sender@gmail.com", "<password>");

但是，通过将UseDefaultCredentials属性设置为true，您将覆盖这些详细信息。

smtp.UseDefaultCredentials = true;

你需要删除那行代码，因为它告诉你的应用程序尝试用你的windows凭证登录gmail。或者，如果这不起作用，您可以在提供新的NetworkCredentials之前将其设置为false:

smtp.UseDefaultCredentials = false;
NetworkCredential NetworkCred = new NetworkCredential("sender@gmail.com", "<password>");

之后，如果你一直得到错误，你需要进入你的gmail帐户安全设置，允许不太安全的应用程序。

你好，我的朋友，我只是想出了这个错误，它只是你没有改变任何sender@gmail.com和密码，只是把你创建的gmail和密码，就像你在我的修改下面看到的，实际上没有什么问题的代码只是把你创建的电子邮件然后密码的gmail，事实上，上面所有的答案都是正确的，但你必须把"<>"从你的密码中删除，你没有把sender@gmail.com改为你各自的gmail......

      NetworkCredential NetworkCred = new NetworkCredential("sender@gmail.com", "<password>");

      NetworkCredential NetworkCred = new NetworkCredential("yourgmail.com", "yourpassword");
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