SMTP-发送邮件

1. 创建socket套接字
<pre name="code" class="cpp">    SOCKET s = socket(PF_INET,SOCK_STREAM,0);  

2.获取smtp服务器地址
 
 
<pre name="code" class="cpp">    sockaddr_in sin;  
    memset(&sin, 0, sizeof(sin));  
    sin.sin_family = AF_INET;  
    sin.sin_port = htons(25);  
    hostent* hptr = gethostbyname("smtp.163.com");  
    memcpy(&sin.sin_addr.S_un.S_addr, hptr->h_addr_list[0], hptr->h_length);
 
 
3. connect服务器
<pre name="code" class="cpp">   connect(s, (sockaddr*)&sin, sizeof(sin))

4. 发送helo命令,相当于向服务器打招呼
    char bufferHello[] = "helo ****\r\n";  
    cout << "helo ehlo..." << endl;  
    send(s, bufferHello, strlen(bufferHello), 0);  
 
 
5. 发送验证请求
<pre name="code" class="cpp">    char bufferLogin[] = "auth login\r\n";  
    cout << "auth login..." << endl;  
    send(s, bufferLogin, strlen(bufferLogin),0);  

6. 发送账号,密码
 
 
<pre name="code" class="cpp">    char bufferUserName[] = "********\r\n";  // 注意,星号应该是邮箱账号、密码的base64编码
    char bufferpsw[] = "**********\r\n"; 
    send(s,bufferUserName,strlen(bufferUserName),0); 
    send(s,bufferpsw,strlen(bufferpsw),0); 
 
 
7. 指示邮件的来源和去处
<pre name="code" class="cpp">    char bufferMailFrom[] = "mail from:<***********>\r\n"; //邮箱账号
    send(s, bufferMailFrom, strlen(bufferMailFrom), 0); 
    char bufferRcptTo[] = "rcpt to:<***********>\r\n";  
    send(s, bufferRcptTo, strlen(bufferRcptTo), 0); 
 
 
8. 发送data命令表示正文开始
<pre name="code" class="cpp">    char bufferData[] = "data\r\n"; 
    send(s, bufferData,strlen(bufferData), 0);

9. 发送正文和结束标志
    char bufferSubject[] = "subject:hello i am jammgit\r\n";  
    send(s, bufferSubject, strlen(bufferSubject), 0); 
    char bufferPoint[] = ".\r\n";  
    send(s, bufferPoint, strlen(bufferPoint), 0); 

 
 

 
 

 
 
 
 

 

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