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Email issues

geomike2 (6)
I can't send an email with c++ and i have been searching for a while and it's bugging me. here is my code:

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#include <iostream>
#include <winsock2.h>
#pragma comment(lib,"ws2_32.lib")

int main()
{
	// Initialise Winsock
	WSADATA WsaDat;
	if(WSAStartup(MAKEWORD(2,2),&WsaDat)!=0)
	{
		std::cout<<"Winsock error - Winsock initialization failed\r\n";
		WSACleanup();
		system("PAUSE");
		return 0;
	}
	
	// Create our socket
	SOCKET Socket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	if(Socket==INVALID_SOCKET)
	{
		std::cout<<"Winsock error - Socket creation Failed!\r\n";
		WSACleanup();
		system("PAUSE");
		return 0;
	}

	// Resolve IP address for hostname
	struct hostent *host;
	if((host=gethostbyname("smtp.gmail.com"))==NULL)
	{
		std::cout<<"Failed to resolve hostname.\r\n";
		WSACleanup();
		system("PAUSE");
		return 0;
	}

	// Setup our socket address structure
	SOCKADDR_IN SockAddr;
	SockAddr.sin_port=htons(587);
	SockAddr.sin_family=AF_INET;
	SockAddr.sin_addr.s_addr=*((unsigned long*)host->h_addr);

	// Attempt to connect to server
	if(connect(Socket,(SOCKADDR*)(&SockAddr),sizeof(SockAddr))!=0)
	{
		std::cout<<"Failed to establish connection with server\r\n";
		WSACleanup();
		system("PAUSE");
		return 0;
	}

	// Display message from server
	char buffer[1000];
	memset(buffer,0,999);
	int inDataLength=recv(Socket,buffer,1000,0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "HELO smtp.gmail.com\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "STARTTLS\r\n");
    send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "MAIL FROM:<***@gmail.com>\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "RCPT TO:<*****@gmail.com>\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "DATA\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "Subject:FIRST EMAIL WITH C++!\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "From: ****@gmail.com\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "To: *****@gmail.com\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "HELLO GOD\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "\r\n. \r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "QUIT\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	// Shutdown our socket
	shutdown(Socket,SD_SEND);

	// Close our socket entirely
	closesocket(Socket);

	// Cleanup Winsock
	WSACleanup();
	system("PAUSE");
	return 0;
}


The main issue is here:

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ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "HELO smtp.gmail.com\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "STARTTLS\r\n");
    send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "MAIL FROM:<***@gmail.com>\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "RCPT TO:<*****@gmail.com>\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "DATA\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "Subject:FIRST EMAIL WITH C++!\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "From: ****@gmail.com\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "To: *****@gmail.com\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "HELLO GOD\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "\r\n. \r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;

	ZeroMemory(&buffer, sizeof(buffer));
	sprintf(buffer, "QUIT\r\n");
	send(Socket, buffer, strlen(buffer), 0);
	recv(Socket, buffer, sizeof(buffer), 0);
	std::cout<<buffer;


After the STARTTLS command the server says "Ready to start TLS", but it won't take my commands after that. I don't know what is wrong and i spent countless hours trying to find out what is wrong. Any help is appreciated.
geomike2 (6)
any suggestions?
closed account (DSLq5Di1)
If only it were that easy.. you need a secure connection:-
http://www.codeproject.com/KB/IP/smtp_ssl.aspx
http://www.coastrd.com/smtps
Last edited on
geomike2 (6)
So what commands should i send. I don't really want to get too deep into this because i just want to know how to send an email, this is just one piece of the puzzle. I have been reading about this for more than 8 hours, and i am just fed up with it. If somebody can just give me the commands i must send I would GREATLY appreciate it.
closed account (DSLq5Di1)
Assuming you've read through either of those links I posted above.. you would realise its not a trivial matter of sending a couple of commands and you are done.

If you wish to handle all the nity grity of authentication, obtaining and verifying a server certificate, an example can be found here -> http://www.coastrd.com/c-schannel-smtp

Though for simplicity I would recommend using an smtp/ssl library, there is plenty floating around if you search for them.
geomike2 (6)
OH MY GOSH!!!! That's just ridiculous. well, what libraries do you recommend that i use?
Galik (2254)
A little googling produced this: http://www.coastrd.com/smtps which may be of use.
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