ASP.net MVC 5 项目 SMTP 功能错误 [重复]

Posted 2023-03-15

【中文标题】ASP.net MVC 5 项目 SMTP 功能错误 [重复]

【英文标题】：ASP.net MVC 5 project SMTP function error [duplicate]

【发布时间】：2020-01-06 19:32:54

【问题描述】：

正如上面的标题，我创建了一个简单的登录和注册的项目。在程序内部，我使用 System.Net.Mail.SmtpException 将电子邮件验证发送到用户电子邮件。我已经创建了电子邮件，但是当我点击创建新帐户时，我也遇到了这个问题。

System.Net.Mail.SmtpException: 'The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required

从我搜索的信息中，我发现有人说我需要对我的电子邮件进行两步验证。我做到了，但问题仍然存在。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Mail;
using System.Web;
using System.Web.Mvc;
using Food_Founder.Models;

namespace Food_Founder.Controllers

    public class UserController : Controller
    
        //Registration
        [HttpGet]
        public ActionResult Registration()
        
            return View();
        

        //Post Registration
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Registration([Bind(Exclude = "IsEmailVerified,ActivationCode")]User user)
        
            //Model Validation
            bool Status = false;
            string message = "";

            //Email is already exist
            if (ModelState.IsValid)
            
                #region Email is already exist
                var isExist = IsEmailExist(user.Email);
                if (isExist)
                
                    ModelState.AddModelError("EmailExist", "Email already exist");
                    return View(user);
                
                #endregion

                #region Generate Activation Code
                user.ActivationCode = Guid.NewGuid();
                #endregion

                #region Password Hashing
                user.Password = Crypto.Hash(user.Password);
                user.ConfirmPassword = Crypto.Hash(user.ConfirmPassword);
                #endregion

                user.IsEmailVerified = false;

                #region Save Data to Database
                using (myDatabaseEntities myDatabase = new myDatabaseEntities())
                
                    myDatabase.Users.Add(user);
                    myDatabase.SaveChanges();

                    //Send Email to User
                    SendVerificationLinkEmail(user.Email, user.ActivationCode.ToString());
                    message = "Registration successfully done. Account activation link" +
                        "has been send to your Email:" + user.Email + "Please go check and activate your account";
                    Status = true;
                
                #endregion

            
            else
            
                message = "Invalid Request";
            

            ViewBag.Message = message;
            ViewBag.Status = Status;
            return View(user);
        

        //Verify Email


        //Verify Email Link


        //Login


        //Login POST


        //Logout



        [NonAction]
        public Boolean IsEmailExist(string email)
        
            using (myDatabaseEntities myDatabase = new myDatabaseEntities())
            
                var v = myDatabase.Users.Where(a => a.Email == email).FirstOrDefault();
                return v != null;
            
        

        [NonAction]
        public void SendVerificationLinkEmail(string email, string activationCode)
        
            var verifyUrl = "/User/VerifyAccount/" + activationCode;
            var link = Request.Url.AbsoluteUri.Replace(Request.Url.PathAndQuery, verifyUrl);

            var fromEmail = new MailAddress("[e-mail]", "yukwokyao");
            var toEmail = new MailAddress(email);
            var fromEmailPassword = "********";
            string subject = "Your account is successfully created!";

            string body = "<br/><br/>We are excited to tell you that your FoodFounder account is" +
                "successfully created. Please click the below link to verify your FoodFounder account" +
                "<a href = '" + link + "' >" + link + "</a>";

            var smtp = new SmtpClient
            
                Host = "smtp.gmail.com",
                Port = 587,
                EnableSsl = true,
                DeliveryMethod = SmtpDeliveryMethod.Network,
                UseDefaultCredentials = false,
                Credentials = new NetworkCredential(fromEmail.Address, fromEmailPassword)
            ;

            using (var message = new MailMessage(fromEmail, toEmail)
            
                Subject = subject,
                Body = body,
                IsBodyhtml = true
            )
            smtp.Send(message);
        
    

上面的代码是我创建的控制器类。我发现的问题就在那里，所以我没有在这里放任何其他设计html代码。最奇怪的是即使我遇到了这个问题，我注册的数据仍然可以键入到数据库中，但是这个烦人的问题仍然存在。任何地方，如果我错过了什么，请告诉我。谢谢。

【参考方案1】：

如果您将 Gmail 帐户用作 SMTP 服务器，则需要允许从 Google 所谓的“不太安全的应用程序”进行访问。您可以从 Google 设置中启用它。

【讨论】：

在这里试试link

我已经启用了，但错误仍然存​​在。