【C++】【网络】利用Socket 编写SMTP 发送邮件程序

最新推荐文章于 2025-08-05 12:33:16 发布

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最新推荐文章于 2025-08-05 12:33:16 发布 · 8.2k 阅读

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#socket #c++ #网络 #input #include #stream

本文展示了如何在C++中通过Socket编程接口连接SMTP服务器，进行邮件发送操作，包括建立连接、身份验证、指定收件人、设置邮件内容等步骤。

#include <winsock.h> #include <stdio.h> #include <string> #include <iostream> using namespace std; #define WSWENS MAKEWORD(2,0) int main() { sockaddr_in sin; WSADATA wsadata; if(WSAStartup(WSWENS, &wsadata) !=0) cout<<"startup failed"<<endl; SOCKET s = socket(PF_INET,SOCK_STREAM,0); memset(&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_port = htons(25); hostent* hptr = gethostbyname("smtp.sina.com"); memcpy(&sin.sin_addr.S_un.S_addr, hptr->h_addr_list[0], hptr->h_length); printf("IP of smpt.sina.com is : %d:%d:%d:%d", sin.sin_addr.S_un.S_un_b.s_b1, sin.sin_addr.S_un.S_un_b.s_b2, sin.sin_addr.S_un.S_un_b.s_b3, sin.sin_addr.S_un.S_un_b.s_b4); cout << endl; if(connect(s, (sockaddr*)&sin, sizeof(sin))) { cout << "connect failed" << endl; exit(0); } else { cout << "connect success" <&