C# 發送郵件，MimeMessage 配置

思路    

 發送郵件一般得有一個發送的賬戶信息，我理解的就是個載體。其次發送內容，最后目標人群。

1.郵箱配置SMTP

   登錄郵箱---設置---賬戶設置---開啟SMTP服務（記住授權碼） 至於更詳細的教程百度搜索

2.下面是發送的方法，這幾個參數啥意思

 /// <summary>
        /// 同步發送郵件
        /// </summary>
        /// <param name="host">主機--QQ郵箱默認smtp.qq.com</param>
        /// <param name="port">端口--QQ郵箱默認465</param>
        /// <param name="account">賬號 --郵箱地址發件人</param>
        /// <param name="password">密碼 --第一步獲取的授權碼</param>
        /// <param name="message">郵件模型</param>
        /// <returns></returns>
        public static Exception Send(string host, int port, string account, string password, MimeMessage message)
        {
            try
            {
                using (var client = new SmtpClient())
                {
                    client.Timeout = 5000;
                    client.Connect(host, port, true);
                    client.Authenticate(account, password);

                    client.Send(message);

                    client.Disconnect(true);
                }

                return null;
            }
            catch (Exception e)
            {
                return e;
            }
        }

MimeMessage  的配置

        public async Task  Emailadd (Guid? id, ERPMarketingEmail Email, List<ERPMarketingCustomer> customlist, AppSettings appSettingService, Guid UserID)
        {
            using (var scope = _serviceScopeFactory.CreateScope())
            {
                var dbContext = scope.ServiceProvider.GetService<UnitemillManageDbContext>();

                MimeMessage message = new MimeMessage();//實例化對象
                message.From.Add(new MailboxAddress(Encoding.UTF8, appSettingService.DisplayName, appSettingService.From));//配置郵件的顯示名稱和發送賬戶 if (Email != null)
                {

                    message.Subject = Email.Title;//郵件的標題 var bodyBuilder = new BodyBuilder();
                    bodyBuilder.HtmlBody = Email.Text;
                    message.Body = bodyBuilder.ToMessageBody();//這是郵件的內容，通過BodyBuilder將text文本轉換成HTML的body,並且賦值給body
                }
                if (customlist.Count > 0)
                {
                    foreach (var oneCustom in customlist)
                    {
                        message.Bcc.Clear();
                        message.To.Clear();
                        if (appSettingService.IsBCC)//這個位置是驗證接收客戶的郵箱是不是隱匿發送（不確定往to里加就行）
                        {
                            message.Bcc.Add(new MailboxAddress(oneCustom.Email));

 }

else { message.To.Add(new MailboxAddress(oneCustom.Email));//message.to 可以繼續添加，我這里是考慮到服務器的壓力所以一個客戶發一次 } int r = new Random().Next(10, 45); System.Threading.Thread.Sleep(r * 1000); Email.CreateDate = DateTime.Now; Email.CreateUserId = UserID; var ex = SMTPHelper.Send(appSettingService.Host, appSettingService.Port, appSettingService.UserName, appSettingService.Password, message);
                      //調用上面的方法執行發送操作，發送完成記得數據庫加一行記錄啊如下 if (ex == null)
                        {
                           成功，添加日志
                        }
                        else
                        {
                           失敗，添加日志
                        }

                    }
                }
            }
        }