贴个C写的邮件发送程序吧。。。。

88250 发表于 2006-9-12 09:04:07

放假的时候写的。。。。呵呵。。。。
参考资料：《HowTo.SMTP》，《SendMail》(NextFly写的)，《MSDN 2005》
好了，废话就不说了。下面是源代码：

#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")
const char *MailData = "From: \"88250\"<dl88250@126.com>\r\n"
                     "Subject: This is only a test mail! ^^\r\n.\r\n";
int main(int argc, char *argv[])
{

WSADATA wsaData;
   WORD wVersionRequested = MAKEWORD(2, 2);
struct hostent *pHostent = NULL;
SOCKET server = INVALID_SOCKET;
struct sockaddr_in service;
int retConnect = 0;
char Buffer = {0};

   if(WSAStartup(wVersionRequested, &wsaData) != 0){
            printf("Error at WSAStartup()\n");
            goto WSACleanup;
}

server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);    //Create a Socket

if(server == INVALID_SOCKET){
            printf("Error at socket(): %ld\n", WSAGetLastError());
   goto WSACleanup;
}

pHostent = gethostbyname("smtp.126.com");          //Get the Mail Server Name
if(pHostent == NULL){
            printf("The Host Name is Invalid...\n");
   goto WSACleanup;
}

service.sin_family = AF_INET;
memcpy(&service.sin_addr.s_addr, pHostent->h_addr_list, pHostent->h_length);
service.sin_port = htons(25);

//Connect to the remote Mail Server
retConnect = connect(server, (struct sockaddr*)&service, sizeof(service));
if(retConnect == SOCKET_ERROR){
            printf("Failed to connect.\n");
   goto WSACleanup;
}

printf("Connect to %s....\n", inet_ntoa(service.sin_addr));

//Receive Data From the Mail Server
   ZeroMemory(Buffer, sizeof(Buffer));
retConnect = recv(server, Buffer, sizeof(Buffer), 0);
if(retConnect == SOCKET_ERROR){
            printf("Failed to connect.\n");
   goto WSACleanup;
}else{
   printf("%s\n", Buffer);
}

//Send "HELO Server....\r\n" to the Mail Server
retConnect = send(server, "HELO Server....\r\n", strlen("HELO Server....\r\n"), 0);
if(retConnect == SOCKET_ERROR){
            printf("Send HELO to the Mail Failure.\n");
   goto WSACleanup;
}else{
      printf("HELO Server....\n");
}

//Receive Data From the Mail Server
ZeroMemory(Buffer, sizeof(Buffer));
retConnect = recv(server, Buffer, sizeof(Buffer), 0);
if(retConnect == SOCKET_ERROR){
            printf("Failed to connect.\n");
   goto WSACleanup;
}else{
   printf("%s\n", Buffer);
}

//Send "AUTH LOGIN\r\n" to the Mail Server
retConnect = send(server, "AUTH LOGIN\r\n", strlen("AUTH LOGIN\r\n"), 0);
if(retConnect == SOCKET_ERROR){
            printf("Send \"AUTH LOGIN\" to Mail Failure.\n");
   goto WSACleanup;
}else{
            printf("AUTH LOGIN\n");
}

//Receive Data From the Mail Server
ZeroMemory(Buffer, sizeof(Buffer));
retConnect = recv(server, Buffer, sizeof(Buffer), 0);
if(retConnect == SOCKET_ERROR){
            printf("Receive Data From Mail Server Failure.\n");
   goto WSACleanup;
}else{
            printf("%s\n", Buffer);
}

//Send UserName to the Mail Server. The UserName is Encoded by Base64.
retConnect = send(server, "bGJleW9uZDRrb21h==\r\n", strlen("bGJleW9uZDRrb21h==\r\n"), 0);
if(retConnect == SOCKET_ERROR){
            printf("Send UserName to the Mail Failure.\n");
   goto WSACleanup;
}else{
            printf("UserName\n");
}

//Receive Data From the Mail Server
ZeroMemory(Buffer, sizeof(Buffer));
retConnect = recv(server, Buffer, sizeof(Buffer), 0);
if(retConnect == SOCKET_ERROR){
            printf("Receive Data From the Mail Server Failure.\n");
   goto WSACleanup;
}else{
   printf("%s\n", Buffer);
}

//Send Password to the Mail Server The Password is Encoded by Base64.
retConnect = send(server, "bGJleW9uZDRrb21h=\r\n", strlen("bGJleW9uZDRrb21h=\r\n"), 0);
if(retConnect == SOCKET_ERROR){
            printf("Send Password to Mail Failure.\n");
   goto WSACleanup;
}else{
            printf("Password\n");
}

//Receive Data From the Mail Server
ZeroMemory(Buffer, sizeof(Buffer));
retConnect = recv(server, Buffer, sizeof(Buffer), 0);
if(retConnect == SOCKET_ERROR){
            printf("Receive Data From the Mail Server Failure.\n");
   goto WSACleanup;
}else{
   printf("%s\n", Buffer);
}

//Send "Mail From: " File to the Mail Server, sender's Mail Address
retConnect = send(server, "MAIL FROM: <lbeyond4koma@126.com>\r\n", strlen("MAIL FROM: <lbeyond4koma@126.com>\r\n"), 0);
if(retConnect == SOCKET_ERROR){
            printf("Send \"Mail From: \" to Mail Failure.\n");
   goto WSACleanup;
}else{
            printf("MAIL FROM: <lbeyond4koma@126.com>\n");
}

//Receive Data From the Mail Server
ZeroMemory(Buffer, sizeof(Buffer));
retConnect = recv(server, Buffer, sizeof(Buffer), 0);
if(retConnect == SOCKET_ERROR){
            printf("Receive Data From Mail Server Failure.\n");
   goto WSACleanup;
}else{
            Buffer = ' ';
   printf("%s\n", Buffer);
}

//Send "RCPT TO: " File to the Mail Server, receiver 's Mail Address
retConnect = send(server, "RCPT TO: <dl88250@gmail.com>\r\n", strlen("RCPT TO: <dl88250@gmail.com>\r\n"), 0);
if(retConnect == SOCKET_ERROR){
            printf("Send \"RCPT TO: \" to Mail Failure.\n");
   goto WSACleanup;
}else{
            printf("RCPT TO: <dl88250@gmail.com>\n");
}

//Receive Data From the Mail Server
ZeroMemory(Buffer, sizeof(Buffer));
retConnect = recv(server, Buffer, sizeof(Buffer), 0);
if(retConnect == SOCKET_ERROR){
            printf("Receive Data From the Mail Server Failure.\n");
   goto WSACleanup;
}else{
   printf("%s\n", Buffer);
}

//Send "Data" Fiele to the Mail Server, start to Send mail
retConnect = send(server, "Data\r\n", strlen("Data\r\n"), 0);
if(retConnect == SOCKET_ERROR){
            printf("Send \"Data\" Field to Mail Failure...\n");
   goto WSACleanup;
}else{
            printf("Data\n");
}

//Receive Data From the Mail Server
ZeroMemory(Buffer, sizeof(Buffer));
retConnect = recv(server, Buffer, sizeof(Buffer), 0);
if(retConnect == SOCKET_ERROR){
            printf("Receive Data From Mail Server Failure...\n");
   goto WSACleanup;
}else{
   printf("%s\n", Buffer);
}

//Send Mail data to the the Mail Server
retConnect = send(server, MailData, strlen(MailData), 0);
if(retConnect == SOCKET_ERROR){
            printf("Send Context Of Mail to Mail Failure...\n");
   goto WSACleanup;
}else{
            printf("%s\n", MailData);
}

//Receive Data From the Mail Server
ZeroMemory(Buffer, sizeof(Buffer));
retConnect = recv(server, Buffer, sizeof(Buffer), 0);
if(retConnect == SOCKET_ERROR){
            printf("Receive Data From Mail Server Failure...\n");
   goto WSACleanup;
}else{
   printf("%s\n", Buffer);
}

//Send "QUIT" Context to the Mail Server
retConnect = send(server, "QUIT\r\n", strlen("QUIT\r\n"), 0);
if(retConnect == SOCKET_ERROR){
            printf("Send \"Quit\" to Mail Failure...\n");
   goto WSACleanup;
}else{
            printf("Quit\n");
}

printf("Send Mail Successful!\n");

   WSACleanup:{
            if(server != INVALID_SOCKET){
                     closesocket(server);
   }
   WSACleanup();
   }
system("pause");
   return 0;
}

其中需要注意的是寄件人地址与邮件内容里的邮件地址的关系：

寄件人的地址必须和你用的连接帐号一致。帐号和密码是使用Base64编码的（关于什么是Base64编码请到http://www.ynutx.net/blog/user1/Myth/archives/2006/1682.html下面看看，它的C实现代码在下面）。。。。

而在邮件内容里的地址只是一个告诉邮件服务器这封信是谁发的。可以和你所使用的发送帐号不一致！也就是说你可以伪造别人的地址进行邮件发送。。。。

哎，不要干什么干事哟^_^! 看邮件头是可以看出原始地址的哦:10:

雨夜心情 发表于 2006-9-12 09:05:04

有没有下载地址~~咳咳~~弄下来玩玩

88250 发表于 2006-9-12 09:55:52

原帖由雨夜心情于 2006-9-12 09:05 发表
有没有下载地址~~咳咳~~弄下来玩玩
下载地址？
我写的。。。。这个是。。。。
你要.exe文件吗？

地狱幻想 发表于 2006-9-12 10:14:43

哈哈,楼主好厉害哦

雨夜心情 发表于 2006-9-12 10:56:14

肯定的嘛，要程序来干嘛~~我们是实用主义~~只喜欢用~~我帮你测试一下，给你些意见~~

88250 发表于 2006-9-12 16:18:23

这个是可执行文件。。。。

雨夜心情 发表于 2006-9-12 18:26:13

下载了~~3Q~~~

88250 发表于 2006-9-12 21:23:19

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东陆风华BBS's Archiver

贴个C写的邮件发送程序吧。。。。