asp.net - 在 asp.net 中发送电子邮件 (Gmail)

Question

我尝试在 asp.net c# 上使用 gmail 帐户 发送电子邮件，但我不断收到此错误:

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond [2607:f8b0:400c:c01::6c]:587

我尝试了来自不同资源的不同代码，但它们都不适用于我的项目 更重要的是，我已经尝试了这些步骤，但仍然不起作用:

1. 在 VS 2012 服务器和本地主机 (iis 7) 上尝试端口 25、465、587。
2. 防火墙设置为关闭，防病毒设置为关闭。
3. 以管理员身份启动 Visual Studio。

请问谁能告诉我这个错误背后的原因是什么。如果有可能改变某些东西，我应该从哪里开始..

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Default6 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        var myMailMessage = new System.Net.Mail.MailMessage();
        myMailMessage.From = new System.Net.Mail.MailAddress("<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="c1b2a4b3b7a4b3a4aca0a8ad81a6aca0a8adefa2aeac" rel="noreferrer noopener nofollow">[email protected]</a>");
        myMailMessage.To.Add("<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9de4f2e8eff8f0fcf4f1dde4fcf5f2f2b3fef2f0" rel="noreferrer noopener nofollow">[email protected]</a>");// Mail would be sent to this address
        myMailMessage.Subject = "Feedback Form";
        myMailMessage.Body = "Hello";

        var smtpServer = new System.Net.Mail.SmtpClient("smtp.gmail.com");
        smtpServer.Port =587;
        smtpServer.Credentials = new System.Net.NetworkCredential("<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="63100611150611060e020a0f23040e020a0f4d000c0e" rel="noreferrer noopener nofollow">[email protected]</a>", "**YOURPASSWORD**");
        smtpServer.EnableSsl = true;
        smtpServer.Send(MyMailMessage);

        Response.Redirect("Default.aspx");
    }
}

Answer 1

试试这个，
添加命名空间

系统.net; 系统.net.邮件；

 protected void Button1_Click(object sender, EventArgs e)
    {
        MailMessage MyMailMessage = new MailMessage();

        MyMailMessage.From = new MailAddress("from");

        MyMailMessage.To.Add("to");

        MyMailMessage.Subject = "Feedback Form";

        MyMailMessage.Body = "This is the test message from xx for testing mail send";

        MyMailMessage.IsBodyHtml = true;

        SmtpClient SMTPServer = new SmtpClient("smtp.gmail.com");

        SMTPServer.Port = 587;

        SMTPServer.Credentials = new System.Net.NetworkCredential("username","password");

        SMTPServer.EnableSsl = true;

        try
        {

            SMTPServer.Send(MyMailMessage);

           //Response.Redirect("Thankyou.aspx");

        }

        catch (Exception ex)
        {



        }