Issue with send mail program

[girish1026]

Hi to all.

I got a code in C++ to send E-Mail form program. I executed the code and it is wrkng fine. At last it showing confirmation as "your message has been send. But in may mail acct i didn't received any message. The code is below.

#define WIN32_LEAN_AND_MEAN

#include <stdio.h>
#include <stdlib.h>
#include <fstream>
#include <iostream>
#include <windows.h>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib")
using namespace std;

// Insist on at least Winsock v1.1
int const VERSION_MAJOR = 1;
int const VERSION_MINOR = 1;

#define CRLF "\r\n" // carriage-return/line feed pair

void ShowUsage(void)
{
cout << "Usage: SENDMAIL mailserv to_addr from_addr messagefile" << endl
<< "Example: SENDMAIL smtp.myisp.com <http://smtp.myisp.com> [e-mail] <mailto:[e-mail]> [e-mail] <mailto:[e-mail]> message.txt" << endl;

exit(1);
}

// Basic error checking for send() and recv() functions
void Check(int iStatus, char *szFunction)
{
if((iStatus != SOCKET_ERROR) && (iStatus))
return;

cerr << "Error during call to " << szFunction << ": " << iStatus << " - " << GetLastError() << endl;
}

int main(int argc, char *argv[])
{
int iProtocolPort = 0;
char szSmtpServerName[64] = "";
char szToAddr[64] = "";
char szFromAddr[64] = "";
char szBuffer[4096] = "";
char szLine[255] = "";
char szMsgLine[255] = "";
SOCKET hServer;
WSADATA WSData;
LPHOSTENT lpHostEntry;
LPSERVENT lpServEntry;
SOCKADDR_IN SockAddr;

// Check for four command-line args
if(argc != 5)
ShowUsage();

// Load command-line args
strcpy(szSmtpServerName, argv[1]);
strcpy(szToAddr, argv[2]);
strcpy(szFromAddr, argv[3]);

// Create input stream for reading email message file
ifstream MsgFile(argv[4]);

// Attempt to intialize WinSock (1.1 or later)
if(WSAStartup(MAKEWORD(VERSION_MAJOR, VERSION_MINOR), &WSData))
{
cout << "Cannot find Winsock v" << VERSION_MAJOR << "." << VERSION_MINOR << " or later!" << endl;

return 1;
}

// Lookup email server's IP address.
lpHostEntry = gethostbyname(szSmtpServerName);
if(!lpHostEntry)
{
cout << "Cannot find SMTP mail server " << szSmtpServerName << endl;

return 1;
}

// Create a TCP/IP socket, no specific protocol
hServer = socket(PF_INET, SOCK_STREAM, 0);
if(hServer == INVALID_SOCKET)
{
cout << "Cannot open mail server socket" << endl;

return 1;
}

// Get the mail service port
lpServEntry = getservbyname("mail", 0);

// Use the SMTP default port if no other port is specified
if(!lpServEntry)
iProtocolPort = htons(IPPORT_SMTP);
else
iProtocolPort = lpServEntry->s_port;

// Setup a Socket Address structure
SockAddr.sin_family = AF_INET;
SockAddr.sin_port = iProtocolPort;
SockAddr.sin_addr = *((LPIN_ADDR)*lpHostEntry->h_addr_list);

// Connect the Socket
if(connect(hServer, (PSOCKADDR) &SockAddr, sizeof(SockAddr)))
{
cout << "Error connecting to Server socket" << endl;

return 1;
}

// Receive initial response from SMTP server
Check(recv(hServer, szBuffer, sizeof(szBuffer), 0), "recv() Reply");

// Send HELO server.com <http://server.com>
sprintf(szMsgLine, "HELO %s%s", szSmtpServerName, CRLF);
Check(send(hServer, szMsgLine, strlen(szMsgLine), 0), "send() HELO");
Check(recv(hServer, szBuffer, sizeof(szBuffer), 0), "recv() HELO");

// Send MAIL FROM: <[e-mail] <mailto:[e-mail]>>
sprintf(szMsgLine, "MAIL FROM:<%s>%s", szFromAddr, CRLF);
Check(send(hServer, szMsgLine, strlen(szMsgLine), 0), "send() MAIL FROM");
Check(recv(hServer, szBuffer, sizeof(szBuffer), 0), "recv() MAIL FROM");

// Send RCPT TO: <[e-mail] <mailto:[e-mail]>>
sprintf(szMsgLine, "RCPT TO:<%s>%s", szToAddr, CRLF);
Check(send(hServer, szMsgLine, strlen(szMsgLine), 0), "send() RCPT TO");
Check(recv(hServer, szBuffer, sizeof(szBuffer), 0), "recv() RCPT TO");

// Send DATA
sprintf(szMsgLine, "DATA%s", CRLF);
Check(send(hServer, szMsgLine, strlen(szMsgLine), 0), "send() DATA");
Check(recv(hServer, szBuffer, sizeof(szBuffer), 0), "recv() DATA");

// Send all lines of message body (using supplied text file)
MsgFile.getline(szLine, sizeof(szLine)); // Get first line

do // for each line of message text...
{
sprintf(szMsgLine, "%s%s", szLine, CRLF);
Check(send(hServer, szMsgLine, strlen(szMsgLine), 0), "send() message-line");
MsgFile.getline(szLine, sizeof(szLine)); // get next line.
} while(MsgFile.good());

// Send blank line and a period
sprintf(szMsgLine, "%s.%s", CRLF, CRLF);
Check(send(hServer, szMsgLine, strlen(szMsgLine), 0), "send() end-message");
Check(recv(hServer, szBuffer, sizeof(szBuffer), 0), "recv() end-message");

// Send QUIT
sprintf(szMsgLine, "QUIT%s", CRLF);
Check(send(hServer, szMsgLine, strlen(szMsgLine), 0), "send() QUIT");
Check(recv(hServer, szBuffer, sizeof(szBuffer), 0), "recv() QUIT");

// Report message has been sent
cout << "Sent " << argv[4] << " as email message to " << szToAddr << endl;

// Close server socket and prepare to exit.
closesocket(hServer);

WSACleanup();

return 0;
}

I am executing this code in Visual Studio 2005 Pro Edition in WIN XP Pro SP3. I am checking this with gmail and i provided SMTP, sending mail, receiving mail, and message in Project Properties->Configuration Settings->Debugging->Debugger to Launch->Local Windows Debugger at Command Arguments as smtp.gmail.com [e-mail] [e-mail] Girish.

I read somewhere that G Mail SMTP requires authentication while sending mails. But here in this code I'm not able 2 find those authentication. Please any one can help me and let me know what r the changes i need to change to work this code properly.

Thanks.

[TheMassiveChipmunk]

Please use code tags :)