ERROR SEND AN EMAIL USING SMTP IN C++

[freedomelem]

i have a code using socket and smtp to send an email in Devc++.when i run code i got some problem .In file ring.txt the error:

Connecting....
220 mx.google.com ESMTP ib4si25594558pad.70 - gsmtp

HELO gmail-smtp-in.l.google.com
250 mx.google.com at your service

MAIL FROM:<[e-mail]>
250 2.1.0 OK ib4si25594558pad.70 - gsmtp

RCPT TO:<[e-mail]>
250 2.1.5 OK ib4si25594558pad.70 - gsmtp

DATA
354 Go ahead ib4si25594558pad.70 - gsmtp

To: [e-mail]
From: [e-mail]
Subject: Logged
hello the world

.

421-4.7.0 [27.77.210.178 15] Our system has detected an unusual rate of

421-4.7.0 unsolicited mail originating from your IP address. To protect our

421-4.7.0 users from spam, mail sent from your IP address has been temporarily

421-4.7.0 rate limited. Please visit

421-4.7.0 http://www.googlequit
.com/mail/help/bulk_mail.html to review our Bulk

421 4.7.0 Email Senders Guidelines. ib4si25594558pad.70 - gsmtp



and now this is my code :


#include <windows.h>
#include <stdio.h>
#include <winuser.h>
#include <windowsx.h>
#include <time.h>
#define BUFSIZE 800
#define waittime 500
/*If you don't know the mail exchange server for an address for the following
"nslookup -querytype=mx gmail.com" but replace gmail.com with the domain for
whatever email address you want. YOU MUST CHANGE THESE SETTINGS OR
IT WILL NOT WORK!!! */
#define cmailserver "gmail-smtp-in.l.google.com"
#define cemailto "[e-mail]"
#define cemailfrom "[e-mail]"
#define LogLength 100
#define SMTPLog "ring.txt"
#define cemailsubject "Logged"
char *emailmessage="hello the world ";

int main(void)
{
time_t theTime=time(0);
SOCKET sockfd;
WSADATA wsaData;
FILE *smtpfile;

#define bufsize 300
int bytes_sent; /* Sock FD */
int err;
struct hostent *host; /* info from gethostbyname */
struct sockaddr_in dest_addr; /* Host Address */
char line[1000];
char *Rec_Buf = (char*) malloc(bufsize+1);
smtpfile=fopen(SMTPLog,"a+");
if (WSAStartup(0x202,&wsaData) == SOCKET_ERROR) {
fputs("WSAStartup failed",smtpfile);
WSACleanup();
return -1;
}
if ( (host=gethostbyname(cmailserver)) == NULL) {
perror("gethostbyname");
exit(1);
}
memset(&dest_addr,0,sizeof(dest_addr));
memcpy(&(dest_addr.sin_addr),host->h_addr,host->h_length);

/* Prepare dest_addr */
dest_addr.sin_family= host->h_addrtype; /* AF_INET from gethostbyname */
dest_addr.sin_port= htons(25); /* PORT defined above */

/* Get socket */

if ((sockfd=socket(AF_INET,SOCK_STREAM,0)) < 0) {
perror("socket");
exit(1);
}
/* Connect !*/
fputs("Connecting....\n",smtpfile);

if (connect(sockfd, (struct sockaddr *)&dest_addr,sizeof(dest_addr)) == -1){
perror("connect");
exit(1);
}
Sleep(waittime);
err=recv(sockfd,Rec_Buf,bufsize,0);Rec_Buf[err] = '\0';
fputs(Rec_Buf,smtpfile);
strcpy(line,"HELO gmail-smtp-in.l.google.com\n");
fputs(line,smtpfile);
bytes_sent=send(sockfd,line,strlen(line),0);
Sleep(waittime);

err=recv(sockfd,Rec_Buf,bufsize,0);Rec_Buf[err] = '\0';
fputs(Rec_Buf,smtpfile);
strcpy(line,"MAIL FROM:<");
strncat(line,cemailfrom,strlen(cemailfrom));
strncat(line,">\n",3);
fputs(line,smtpfile);
bytes_sent=send(sockfd,line,strlen(line),0);
Sleep(waittime);

err=recv(sockfd,Rec_Buf,bufsize,0);Rec_Buf[err] = '\0';
fputs(Rec_Buf,smtpfile);
strcpy(line,"RCPT TO:<");
strncat(line,cemailto,strlen(cemailto));
strncat(line,">\n",3);
fputs(line,smtpfile);
bytes_sent=send(sockfd,line,strlen(line),0);
Sleep(waittime);

err=recv(sockfd,Rec_Buf,bufsize,0);Rec_Buf[err] = '\0';
fputs(Rec_Buf,smtpfile);
strcpy(line,"DATA\n");
fputs(line,smtpfile);
bytes_sent=send(sockfd,line,strlen(line),0);
Sleep(waittime);

err=recv(sockfd,Rec_Buf,bufsize,0);Rec_Buf[err] = '\0';
fputs(Rec_Buf,smtpfile);
Sleep(waittime);

strcpy(line,"To: ");
strcat(line,cemailto);
strcat(line,"\n");


strcat(line,"From: ");
strcat(line,cemailfrom);
strcat(line,"\n");


/* strcpy(line,"Cc: ");
strcat(line,"[e-mail]");
strcat(line,"\n");

strcpy(line,"Date: ");
strcat(line,ctime(&theTime));
strcat(line,"\n");
*/


strcat(line,"Subject: ");
strcat(line,cemailsubject);
strcat(line,"\n");

strcat(line,emailmessage);
strcat(line,"\r\n.\r\n");
fputs(line,smtpfile);

bytes_sent=send(sockfd,line,strlen(line),0);
Sleep(waittime);

err=recv(sockfd,Rec_Buf,bufsize,0);Rec_Buf[err] = '\0';
fputs(Rec_Buf,smtpfile);
strcpy(line,"quit\n");
fputs(line,smtpfile);
bytes_sent=send(sockfd,line,strlen(line),0);
Sleep(waittime);

err=recv(sockfd,Rec_Buf,bufsize,0);Rec_Buf[err] = '\0';
fputs(Rec_Buf,smtpfile);
fclose(smtpfile);
#ifdef WIN32
closesocket(sockfd);
WSACleanup();
#else
close(sockfd);
#endif
}

i'm very happy if anyone can help me ....

[kbw]

Our system has detected an unusual rate of unsolicited mail originating from your IP address. To protect our users from spam, mail sent from your IP address has been temporarily rate limited. Please visit http://www.googlequit.com/mail/help/bulk_mail.html to review our Bulk Email Senders Guidelines. ib4si25594558pad.70 - gsmtp

What exactly do you need help with?

[freedomelem]

I want to send the message :
char *emailmessage="hello the world ";
to my email account but email server reply error :
421-4.7.0 [27.77.210.178 15] Our system has detected an unusual rate of

421-4.7.0 unsolicited mail originating from your IP address. To protect our

421-4.7.0 users from spam, mail sent from your IP address has been temporarily

421-4.7.0 rate limited. Please visit

421-4.7.0 http://www.googlequit
.com/mail/help/bulk_mail.html to review our Bulk
how can i fix it to send an message to my email account

[kbw]

You don't you follow the instructions issued by the server. It thinks you've been naughty and won't talk to you.

[Computergeek01]

@ OP: This is an anti-spam counter measure, I triggered them a few times myself playing around with this stuff. They usually lift in a day or two for the first offence.