C#自動發送郵件

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using System;using System.Collections.Generic;using System.Linq;using System.Net.Mail;using System.Text;using System.Threading.Tasks;namespace QQEmail{    class Program    {        static void Main(string[] args)        {            for (int i = 0; i < 50; i++)            {                MailMessage mymail = new MailMessage();                mymail.From = new System.Net.Mail.MailAddress("郵箱@qq.com");                mymail.To.Add("[email protected]");                mymail.Subject = "C#自動發送郵件測試 From HaoLiu TO [email protected]";                mymail.Body = "不好意思，我在測試程式，剛才把QQ號寫錯了，Sorry！";                mymail.IsBodyHtml = true;                SmtpClient smtpclient = new SmtpClient();                smtpclient.DeliveryMethod = SmtpDeliveryMethod.Network;                smtpclient.Host = "smtp.qq.com";                smtpclient.Credentials = new System.Net.NetworkCredential("郵箱@qq.com", "密碼");                try                {                    smtpclient.Send(mymail);                    Console.WriteLine("發送成功");                }                catch (Exception ex)                {                    Console.WriteLine("發送郵件失敗.請檢查是否為qq郵箱，並且沒有被防護軟體攔截");                }            }        }    }}