SMTP实现发送邮箱1
#include "stdafx.h" #include <iostream> #include <WinSock2.h> using namespace std; #pragma comment(lib,"ws2_32.lib") #define _WINSOCK_DEPRECATED_NO_WARNINGS struct Base64Date6 { unsigned int d4 : 6; unsigned int d3 : 6; unsigned int d2 : 6; unsigned int d1 : 6; }; // 协议中加密部分使用的是base64方法 char ConvertToBase64(char c6); void EncodeBase64(char*dbuf, char*buf128, int len); void SendMail(char*email, char*body); int OpenSocket(struct sockaddr *addr); char ConvertToBase64(char uc) { if (uc < 26) { return'A' + uc; } if (uc < 52) { return'a' + (uc - 26); } if (uc < 62) { return'0' + (uc - 52); } if (uc == 62) { return'+'; } return'/'; } // base64的实现 void EncodeBase64(char*dbuf, char*buf128, int len) { struct Base64Date6*ddd = NULL; int i = 0; char buf[256] = { 0 }; char *tmp = NULL; char cc = '\0'; memset(buf, 0, 256); strcpy_s(buf, buf128); for (i = 1; i <= len / 3; i++) { tmp = buf + (i - 1) * 3; cc = tmp[2]; tmp[2] = tmp[0]; tmp[0] = cc; ddd = (struct Base64Date6*)tmp; dbuf[(i - 1) * 4 + 0] = ConvertToBase64((unsigned int)ddd->d1); dbuf[(i - 1) * 4 + 1] = ConvertToBase64((unsigned int)ddd->d2); dbuf[(i - 1) * 4 + 2] = ConvertToBase64((unsigned int)ddd->d3); dbuf[(i - 1) * 4 + 3] = ConvertToBase64((unsigned int)ddd->d4); } if (len % 3 == 1) { tmp = buf + (i - 1) * 3; cc = tmp[2]; tmp[2] = tmp[0]; tmp[0] = cc; ddd = (struct Base64Date6*)tmp; dbuf[(i - 1) * 4 + 0] = ConvertToBase64((unsigned int)ddd->d1); dbuf[(i - 1) * 4 + 1] = ConvertToBase64((unsigned int)ddd->d2); dbuf[(i - 1) * 4 + 2] = '='; dbuf[(i - 1) * 4 + 3] = '='; } if (len % 3 == 2) { tmp = buf + (i - 1) * 3; cc = tmp[2]; tmp[2] = tmp[0]; tmp[0] = cc; ddd = (struct Base64Date6*)tmp; dbuf[(i - 1) * 4 + 0] = ConvertToBase64((unsigned int)ddd->d1); dbuf[(i - 1) * 4 + 1] = ConvertToBase64((unsigned int)ddd->d2); dbuf[(i - 1) * 4 + 2] = ConvertToBase64((unsigned int)ddd->d3); dbuf[(i - 1) * 4 + 3] = '='; } return; } void SendMail(char*email, char*body) { int sockfd = { 0 }; char buf[1500] = { 0 }; char rbuf[1500] = { 0 }; char login[128] = { 0 }; char pass[128] = { 0 }; WSADATA WSAData; SOCKADDR_IN their_addr;; WSAStartup(MAKEWORD(2, 2), &WSAData); memset(&their_addr, 0, sizeof(their_addr)); their_addr.sin_family = AF_INET; their_addr.sin_port = htons(25); hostent*hptr = gethostbyname("smtp.163.com"); // 用的是163服务器 memcpy(&their_addr.sin_addr.S_un.S_addr, hptr->h_addr_list[0], hptr->h_length); // 连接邮件服务器,如果连接后没有响应,则2 秒后重新连接 sockfd = OpenSocket((struct sockaddr *)&their_addr); memset(rbuf, 0, 1500); while (recv(sockfd, rbuf, 1500, 0) == 0) { sockfd = OpenSocket((struct sockaddr *)&their_addr); memset(rbuf, 0, 1500); } // EHLO memset(buf, 0, 1500); //buf[]="EHLO HYL-PC\r\n"; sprintf_s(buf, "EHLO HYL-PC\r\n"); send(sockfd, buf, strlen(buf), 0); memset(rbuf, 0, 1500); recv(sockfd, rbuf, 1500, 0); cout << "EHLO REceive: " << rbuf << endl; // AUTH LOGIN memset(buf, 0, 1500); sprintf_s(buf, "AUTH LOGIN\r\n"); send(sockfd, buf, strlen(buf), 0); memset(rbuf, 0, 1500); recv(sockfd, rbuf, 1500, 0); cout << "Auth Login Receive: " << rbuf << endl; // USER memset(buf, 0, 1500); sprintf_s(buf, "noname_2000@163.com"); memset(login, 0, 128); EncodeBase64(login, buf, strlen(buf)); sprintf_s(buf, "%s\r\n", login); send(sockfd, buf, strlen(buf), 0); cout << "Base64 UserName: " << buf << endl; memset(rbuf, 0, 1500); recv(sockfd, rbuf, 1500, 0); cout << "User Login Receive: " << rbuf << endl; // PASSWORD sprintf_s(buf, "swfrezee");//你的邮箱密码 memset(pass, 0, 128); EncodeBase64(pass, buf, strlen(buf)); sprintf_s(buf, "%s\r\n", pass); send(sockfd, buf, strlen(buf), 0); cout << "Base64 Password: " << buf << endl; memset(rbuf, 0, 1500); recv(sockfd, rbuf, 1500, 0); cout << "Send Password Receive: " << rbuf << endl; // MAIL FROM memset(buf, 0, 1500); sprintf_s(buf, "MAIL FROM: <noname_2000@163.com>\r\n"); send(sockfd, buf, strlen(buf), 0); memset(rbuf, 0, 1500); recv(sockfd, rbuf, 1500, 0); cout << "set Mail From Receive: " << rbuf << endl; // RCPT TO 第一个收件人 sprintf_s(buf, "RCPT TO:<%s>\r\n", email); send(sockfd, buf, strlen(buf), 0); memset(rbuf, 0, 1500); recv(sockfd, rbuf, 1500, 0); cout << "Tell Sendto Receive: " << rbuf << endl; // DATA 准备开始发送邮件内容 sprintf_s(buf, "DATA\r\n"); send(sockfd, buf, strlen(buf), 0); memset(rbuf, 0, 1500); recv(sockfd, rbuf, 1500, 0); cout << "Send Mail Prepare Receive: " << rbuf << endl; // 发送邮件内容,\r\n.\r\n内容结束标记 sprintf_s(buf, "%s\r\n.\r\n", body); send(sockfd, buf, strlen(buf), 0); memset(rbuf, 0, 1500); recv(sockfd, rbuf, 1500, 0); cout << "Send Mail Receive: " << rbuf << endl; // QUIT sprintf_s(buf, "QUIT\r\n"); send(sockfd, buf, strlen(buf), 0); memset(rbuf, 0, 1500); recv(sockfd, rbuf, 1500, 0); cout << "Quit Receive: " << rbuf << endl; //清理工作 closesocket(sockfd); WSACleanup(); return; } // 打开TCP Socket连接 int OpenSocket(struct sockaddr *addr) { int sockfd = 0; sockfd = socket(PF_INET, SOCK_STREAM, 0); if (sockfd < 0) { cout << "Open sockfd(TCP) error!" << endl; exit(-1); } if (connect(sockfd, addr, sizeof(struct sockaddr)) < 0) { cout << "Connect sockfd(TCP) error!" << endl; exit(-1); } return sockfd; } int main(int argc, char **argv) { char EmailTo[] = "XXX_XXX@163.com";//发给的邮箱 char EmailContents[1000] = "From: \"A\"<XXX_XXX@163.com>\r\n" "To: \"B\"<XXX_XXX@163.com>\r\n" "Subject: Jason!\r\n\r\n" "come from China!"; SendMail(EmailTo, EmailContents); getchar(); }