using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Net.Mail;namespace mail{  class Program  {    static void Main(string[] args)    {      //發件人地址      MailAddress from = new MailAddress("*********@qq.com");      MailMessage message = new MailMessage();      message.Body = "this is a test";      message.IsBodyHtml = true;      message.BodyEncoding = System.Text.Encoding.UTF8;      //收件人地址      message.To.Add("********bizip.com");      message.Subject = "hello !";      message.SubjectEncoding = System.Text.Encoding.UTF8;      message.From = from;      SmtpClient client = new SmtpClient();      client.EnableSsl = true;      client.Host = "smtp.qq.com";      client.Port = 587;      //郵箱賬戶和密碼      client.Credentials = new System.Net.NetworkCredential("mailacount","password");      try      {        client.Send(message);      }      catch (Exception ex)      {        string mssage = ex.ToString();      }         }  }}