贴个C写的邮件发送程序吧。。。。

88250

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：

1. 
   
2. 
   
3. #include <stdio.h>
   
4. #include <stdlib.h>
   
5. #include <winsock2.h>
   
6. #pragma comment(lib, "ws2_32.lib")
   
7. const char *MailData = "From: "88250"<dl88250@126.com>\r\n"
   
8.                         "Subject: This is only a test mail! ^^\r\n.\r\n";
   
9. int main(int argc, char *argv[])
   
10. {
    
11.    
    
12.     WSADATA wsaData;
    
13.         WORD wVersionRequested = MAKEWORD(2, 2);
    
14.     struct hostent *pHostent = NULL;
    
15.     SOCKET server = INVALID_SOCKET;
    
16.     struct sockaddr_in service;
    
17.     int retConnect = 0;
    
18.     char Buffer[1024] = {0};
    
19.      
    
20.         if(WSAStartup(wVersionRequested, &wsaData) != 0){
    
21.                 printf("Error at WSAStartup()\n");
    
22.                 goto WSACleanup;
    
23.     }
    
24.      
    
25.     server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);        //Create a Socket
    
26. 
    
27.     if(server == INVALID_SOCKET){
    
28.                 printf("Error at socket(): %ld\n", WSAGetLastError());
    
29.         goto WSACleanup;
    
30.     }
    
31.      
    
32.     pHostent = gethostbyname("smtp.126.com");              //Get the Mail Server Name
    
33.     if(pHostent == NULL){
    
34.                 printf("The Host Name is Invalid...\n");
    
35.         goto WSACleanup;
    
36.     }
    
37.      
    
38.     service.sin_family = AF_INET;
    
39.     memcpy(&service.sin_addr.s_addr, pHostent->h_addr_list[0], pHostent->h_length);
    
40.     service.sin_port = htons(25);
    
41. 
    
42.     //Connect to the remote Mail Server
    
43.     retConnect = connect(server, (struct sockaddr*)&service, sizeof(service));
    
44.     if(retConnect == SOCKET_ERROR){
    
45.                 printf("Failed to connect.\n");
    
46.         goto WSACleanup;
    
47.     }
    
48.      
    
49.     printf("Connect to %s....\n", inet_ntoa(service.sin_addr));
    
50.      
    
51.     //Receive Data From the Mail Server
    
52.         ZeroMemory(Buffer, sizeof(Buffer));
    
53.     retConnect = recv(server, Buffer, sizeof(Buffer), 0);
    
54.     if(retConnect == SOCKET_ERROR){
    
55.                 printf("Failed to connect.\n");     
    
56.         goto WSACleanup;      
    
57.     }else{
    
58.         printf("%s\n", Buffer);
    
59.     }
    
60.      
    
61.     //Send "HELO Server....\r\n" to the Mail Server
    
62.     retConnect = send(server, "HELO Server....\r\n", strlen("HELO Server....\r\n"), 0);
    
63.     if(retConnect == SOCKET_ERROR){
    
64.                 printf("Send HELO to the Mail Failure.\n");
    
65.         goto WSACleanup;
    
66.     }else{
    
67.            printf("HELO Server....\n");   
    
68.     }   
    
69.      
    
70.     //Receive Data From the Mail Server
    
71.     ZeroMemory(Buffer, sizeof(Buffer));
    
72.     retConnect = recv(server, Buffer, sizeof(Buffer), 0);
    
73.     if(retConnect == SOCKET_ERROR){
    
74.                 printf("Failed to connect.\n");     
    
75.         goto WSACleanup;      
    
76.     }else{
    
77.         printf("%s\n", Buffer);
    
78.     }
    
79. 
    
80.     //Send "AUTH LOGIN\r\n" to the Mail Server
    
81.     retConnect = send(server, "AUTH LOGIN\r\n", strlen("AUTH LOGIN\r\n"), 0);
    
82.     if(retConnect == SOCKET_ERROR){
    
83.                 printf("Send "AUTH LOGIN" to Mail Failure.\n");
    
84.         goto WSACleanup;
    
85.     }else{
    
86.                 printf("AUTH LOGIN\n");   
    
87.     }      
    
88. 
    
89.     //Receive Data From the Mail Server
    
90.     ZeroMemory(Buffer, sizeof(Buffer));
    
91.     retConnect = recv(server, Buffer, sizeof(Buffer), 0);
    
92.     if(retConnect == SOCKET_ERROR){
    
93.                 printf("Receive Data From Mail Server Failure.\n");     
    
94.         goto WSACleanup;      
    
95.     }else{  
    
96.                 printf("%s\n", Buffer);
    
97.     }
    
98.    
    
99.     //Send UserName to the Mail Server. The UserName is Encoded by Base64.
    
100.     retConnect = send(server, "bGJleW9uZDRrb21h==\r\n", strlen("bGJleW9uZDRrb21h==\r\n"), 0);
     
101.     if(retConnect == SOCKET_ERROR){
     
102.                 printf("Send UserName to the Mail Failure.\n");
     
103.         goto WSACleanup;
     
104.     }else{
     
105.                 printf("UserName\n");   
     
106.     }      
     
107.          
     
108.     //Receive Data From the Mail Server
     
109.     ZeroMemory(Buffer, sizeof(Buffer));
     
110.     retConnect = recv(server, Buffer, sizeof(Buffer), 0);
     
111.     if(retConnect == SOCKET_ERROR){
     
112.                 printf("Receive Data From the Mail Server Failure.\n");     
     
113.         goto WSACleanup;      
     
114.     }else{
     
115.         printf("%s\n", Buffer);
     
116.     }
     
117. 
     
118.     //Send Password to the Mail Server The Password is Encoded by Base64.
     
119.     retConnect = send(server, "bGJleW9uZDRrb21h=\r\n", strlen("bGJleW9uZDRrb21h=\r\n"), 0);
     
120.     if(retConnect == SOCKET_ERROR){
     
121.                 printf("Send Password to Mail Failure.\n");
     
122.         goto WSACleanup;
     
123.     }else{
     
124.                 printf("Password\n");   
     
125.     }   
     
126.      
     
127.     //Receive Data From the Mail Server
     
128.     ZeroMemory(Buffer, sizeof(Buffer));
     
129.     retConnect = recv(server, Buffer, sizeof(Buffer), 0);
     
130.     if(retConnect == SOCKET_ERROR){
     
131.                 printf("Receive Data From the Mail Server Failure.\n");     
     
132.         goto WSACleanup;      
     
133.     }else{
     
134.         printf("%s\n", Buffer);
     
135.     }
     
136. 
     
137.     //Send "Mail From: " File to the Mail Server, sender's Mail Address
     
138.     retConnect = send(server, "MAIL FROM: <lbeyond4koma@126.com>\r\n", strlen("MAIL FROM: <lbeyond4koma@126.com>\r\n"), 0);
     
139.     if(retConnect == SOCKET_ERROR){
     
140.                 printf("Send "Mail From: " to Mail Failure.\n");
     
141.         goto WSACleanup;
     
142.     }else{
     
143.                 printf("MAIL FROM: <lbeyond4koma@126.com>\n");   
     
144.     }   
     
145.      
     
146.     //Receive Data From the Mail Server
     
147.     ZeroMemory(Buffer, sizeof(Buffer));
     
148.     retConnect = recv(server, Buffer, sizeof(Buffer), 0);
     
149.     if(retConnect == SOCKET_ERROR){
     
150.                 printf("Receive Data From Mail Server Failure.\n");     
     
151.         goto WSACleanup;      
     
152.     }else{
     
153.                 Buffer[retConnect] = ' ';
     
154.         printf("%s\n", Buffer);
     
155.     }
     
156. 
     
157.     //Send "RCPT TO: " File to the Mail Server, receiver 's Mail Address
     
158.     retConnect = send(server, "RCPT TO: <dl88250@gmail.com>\r\n", strlen("RCPT TO: <dl88250@gmail.com>\r\n"), 0);
     
159.     if(retConnect == SOCKET_ERROR){
     
160.                 printf("Send "RCPT TO: " to Mail Failure.\n");
     
161.         goto WSACleanup;
     
162.     }else{
     
163.                 printf("RCPT TO: <dl88250@gmail.com>\n");   
     
164.     }   
     
165.      
     
166.     //Receive Data From the Mail Server
     
167.     ZeroMemory(Buffer, sizeof(Buffer));
     
168.     retConnect = recv(server, Buffer, sizeof(Buffer), 0);
     
169.     if(retConnect == SOCKET_ERROR){
     
170.                 printf("Receive Data From the Mail Server Failure.\n");     
     
171.         goto WSACleanup;      
     
172.     }else{
     
173.         printf("%s\n", Buffer);
     
174.     }
     
175. 
     
176.     //Send "Data" Fiele to the Mail Server, start to Send mail
     
177.     retConnect = send(server, "Data\r\n", strlen("Data\r\n"), 0);
     
178.     if(retConnect == SOCKET_ERROR){
     
179.                 printf("Send "Data" Field to Mail Failure...\n");
     
180.         goto WSACleanup;
     
181.     }else{
     
182.                 printf("Data\n");   
     
183.     }   
     
184. 
     
185.     //Receive Data From the Mail Server
     
186.     ZeroMemory(Buffer, sizeof(Buffer));
     
187.     retConnect = recv(server, Buffer, sizeof(Buffer), 0);
     
188.     if(retConnect == SOCKET_ERROR){
     
189.                 printf("Receive Data From Mail Server Failure...\n");     
     
190.         goto WSACleanup;      
     
191.     }else{
     
192.         printf("%s\n", Buffer);
     
193.     }
     
194. 
     
195.     //Send Mail data to the the Mail Server
     
196.     retConnect = send(server, MailData, strlen(MailData), 0);
     
197.     if(retConnect == SOCKET_ERROR){
     
198.                 printf("Send Context Of Mail to Mail Failure...\n");
     
199.         goto WSACleanup;
     
200.     }else{
     
201.                 printf("%s\n", MailData);
     
202.     }
     
203. 
     
204.     //Receive Data From the Mail Server
     
205.     ZeroMemory(Buffer, sizeof(Buffer));
     
206.     retConnect = recv(server, Buffer, sizeof(Buffer), 0);
     
207.     if(retConnect == SOCKET_ERROR){
     
208.                 printf("Receive Data From Mail Server Failure...\n");     
     
209.         goto WSACleanup;      
     
210.     }else{
     
211.         printf("%s\n", Buffer);
     
212.     }
     
213. 
     
214.     //Send "QUIT" Context to the Mail Server
     
215.     retConnect = send(server, "QUIT\r\n", strlen("QUIT\r\n"), 0);
     
216.     if(retConnect == SOCKET_ERROR){
     
217.                 printf("Send "Quit" to Mail Failure...\n");
     
218.         goto WSACleanup;
     
219.     }else{
     
220.                 printf("Quit\n");   
     
221.     }   
     
222.    
     
223.     printf("Send Mail Successful!\n");
     
224.                
     
225.         WSACleanup:{
     
226.                 if(server != INVALID_SOCKET){
     
227.                         closesocket(server);
     
228.         }
     
229.         WSACleanup();         
     
230.         }
     
231.     system("pause");
     
232.         return 0;
     
233. }
     

复制代码

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

有没有下载地址~~咳咳~~弄下来玩玩

88250

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

哈哈,楼主好厉害哦

雨夜心情

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

这个是可执行文件。。。。

雨夜心情

下载了~~3Q~~~

88250

- -!