代码如下 
    IdSMTP1->Host="smtp.sina.com.cn";
        IdSMTP1->Port=25;
        IdSMTP1->UserId="hsde3131";
        IdSMTP1->Password="******";
        IdSMTP1->AuthenticationType=atLogin;
        IdSMTP1->Connect();   
         Application->MessageBoxA("连接成功","信息",MB_OK);   
  
                  IdMessage1->Clear();   
                  IdMessage1->From->Text="hsde3131@sina.com";   
                  IdMessage1->ReceiptRecipient->Text="";   
                  IdMessage1->Recipients->EMailAddresses="375520@qq.com";   
    
                  IdMessage1->Subject="haha";   
                  IdMessage1->Body->Text="heihei";
                  

    IdSMTP1->Send(IdMessage1);
    IdSMTP1->Disconnect();




运行包535错误，不知为什么