Dotjum@點部落

  MailMessage em = new MailMessage();
  em.From = new System.Net.Mail.MailAddress("你的Gmail帳號@gmail.com", "顯示名稱", System.Text.Encoding.UTF8);
  em.SubjectEncoding = System.Text.Encoding.UTF8;    
  em.BodyEncoding = Encoding.UTF8;
  //信件主題
  em.Subject = subject;
  //內容
  em.Body = message;
  em.IsBodyHtml = true;
  System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();
  //登入帳號認證  
  client.Credentials = new System.Net.NetworkCredential("你的Gmail帳號@gmail.com", "你Gmail的密碼");
  //使用587 Port
  client.Port = 587;
  client.Host = "smtp.gmail.com";
  //啟動SSL
  client.EnableSsl = true;
  //寄出
  client.Send(em);

<div>
    $MemberName$  您好：<br />
      
       歡迎您加入專屬於IT技術園地 點部落，這是您的啟動連結 <A href='http://www.dotblogs.com.tw/Register2.aspx?id=$ActiveNo$'>啟動連結 </A>
          <br />請點選您的啟動連結，進行下一步的設定。
</div>

StreamReader sr = null;
string strBody = "";

//讀取信件範本
try
  ...{
      sr = new StreamReader(Server.MapPath("信件範本.htm"), Encoding.Default);
      strBody = sr.ReadToEnd();

  }
   catch (Exception ex)
  ...{
     throw ex;
  }
  finally
  ...{
    sr.Close();
  }
   //將範本內的特定變數作取代
   strBody = strBody.Replace("$MemberName$", strName);    
   strBody = strBody.Replace("$ActiveNo$", activeGuid);