dev-cpp-users

[Dev-C++] send()/recv() SMTP commands

[KrowniX \(\)--\(\) <kr...@ya...>]

Hi,

I ´m having trouble in send() and recv() smtp commands, I already write my code, and there´s no error, and works without problems but I still don´t send e-mails...
I´m posting my code here, could you take a look a maybe tell me where I´m wrong?

If someone need the .dev file to try help me, let me know that I will send it to you.

Bye, 

Krownix


#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#include "base64.h"

int Help()
{
    printf("Modo de uso:\n");
    printf("    -h    Help do programa\n");
    printf("    -v    Versão do programa\n\n");
    printf("    -s    IP do servidor SMTP\n");
    printf("    -u    Usuario do servidor SMTP\n");
    printf("    -p    Senha do servidor SMTP\n");
    printf("    -f    Email de quem esta enviando\n");
    printf("    -t    Email de quem irá receber o email\n");
    printf("    -b    Assunto do email\n");
    printf("    -d    Corpo da mensagem\n");
    printf("    -r    Caminho do arquivo que será enviado como corpo\n\n");  
    printf("Lembrando que usando -b e/ou -d será necessario usar o simbolo %20 ao invez de espaço\n\n");
    printf("Exempo:\n");
    printf("emailer -s 209.191.85.254 -u meuuser -p senhateste -f me...@ya... -t meu...@gm... -b Assunto%20do%20meu%20email -r C:\\corpo.txt\n");
    return 0;
}

int Version()
{
    printf("Versao: 0.1\n");
}

char *strreplace(char *str)
{
     char *strf;
     int i, j=0;
     
     strf=malloc(strlen(str) * sizeof(char));
     for(i=0; i<strlen(str); i++)
     {
         if(str[i] == '%')
             if(str[i+1] == '2')
                 if(str[i+2] == '0')
                 {
                     strf[j]=' ';
                     i=i+2;
                     j++;
                     continue;
                 }
         strf[j]=str[i];
         j++;
     }
     strf[j]='\0';
     return strf;
}

int main(int argc, char **argv)
{
     /*if(argc>6)
     {
         Help();
         exit(0);
     }*/

    int i=0, j=0; //Contadores
    char *Servidor, *Usuario, *Senha, *From, *To, *Subject, *Body;
    
    for (i=1; i<argc; i++) //Looping que percorre os argumentos
    {
        switch(argv[i][1]) //Transferencia dos argumentos para as variaveis
        {
            case 'v': //Version. Mostra a versão do programa
                 Version();
                 exit(0);
                 break;
            case 'h': //Help. Chama o Help do programa
                 Help();
                 exit(0);
                 break;
            case 's': //Server. Endereço do servidor
                 i++;
                 Servidor=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(Servidor, argv[i]);
                 break;
            case 'u': //User. Usuario do servidor
                 i++;
                 Usuario=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(Usuario, argv[i]);
                 break;
            case 'p': //Password. Senha do servidor
                 i++;
                 Senha=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(Senha, argv[i]);
                 break;
            case 'f': //From. Email de quem ta enviando
                i++;
                 From=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(From, argv[i]);
                 break;
            case 't': //To. Email de quem vai receber
                 i++;
                 To=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(To, argv[i]);
                 break;
            case 'b': //Subject. Assunto do email
                 i++;
                 Subject=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(Subject, strreplace(argv[i]));
                 break;
            case 'd': //Body. Corpo do email
                 i++;
                 Body=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(Body, strreplace(argv[i]));
                 break;
            case 'r': //Body. Corpo do email com arquivo
                 i++;
                 FILE *arq=fopen(argv[i], "r");
                 char ch;
                 if(arq==NULL)
                 {
                     printf("O arquivo referente ao corpo da mensagem não existe, ou não pode ser aberto\n");
                     exit(0);
                 }    
                 
                 while((ch=fgetc(arq))!=EOF) 
                     j++;
                 
                 fseek(arq, -1*j*sizeof(char), 1); 
                 Body=malloc(j * sizeof(char)); 
                 j=0;

                 while((ch=fgetc(arq))!=EOF) //put FILE in Body
                 {
                     Body[j]=ch;
                     j++;
                 }
                 Body[j]='\0';
                 break;
        }
    }

    //crypt pass/user
    if((Usuario!=NULL) && (Senha!=NULL))
    {
        char r[30];
        int res, outlen;
        res=encode64(Usuario, strlen(Usuario), r, strlen(Usuario)*2, &outlen);
        free(Usuario);
        Usuario=malloc(strlen(r) * sizeof(char));
        strcpy(Usuario, r);

        res=encode64(Senha, strlen(Senha), r, strlen(Senha)*2, &outlen);
        free(Senha);
        Senha=malloc(strlen(r) * sizeof(char));
        strcpy(Senha, r);
    }        
    
    
    WSADATA wsadata;
    HOSTENT *HostInfo;
    SOCKET Sck;
    struct sockaddr_in Remote;
    long tmpCon;
    int Conexao;
    char Buffer[512];
    
    if(WSAStartup(MAKEWORD(2,0), &wsadata)!=0) 
    {
        printf("Winsock não encontrado\n");
        exit(0);
    }
    if(LOBYTE(wsadata.wVersion )!=2||HIBYTE(wsadata.wVersion )!=0) 
    {
        printf("Versão do winsock antiga. Atualize o winsock\n");
        exit(0);
    }
    
    Sck=socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
    Remote.sin_family = AF_INET;
    Remote.sin_port = htons(25);
    Remote.sin_addr.s_addr = inet_addr(Servidor);
    
    
    HostInfo = gethostbyname(Servidor);
    if (HostInfo == NULL)
    {
        printf("Impossivel conectar ao servidor.\n");
        exit(0);
    }
    Conexao=connect(Sck,(struct sockaddr *)&Remote, sizeof(Remote));
    tmpCon = GetTickCount();
    while(Conexao!=0)
        if ((GetTickCount()-tmpCon) > 2500) break;
    
    if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
    {
        printf("A conexao foi desfeita\n");
        exit(0);
    }
    memset(Buffer, '\0', sizeof(Buffer));
    
    if(Conexao==0)
    {
      if(Usuario==NULL)
        {
            send(Sck, "HELO\r\n", 6, 0);
            printf("enviando helo");
            if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
            {
                printf("A conexao foi desfeita\n");
                exit(0);
            }
            else
            {
                if(strstr(Buffer, "250")==0)
                {
                    printf("Erro inexperado.\n");
                    send(Sck, "quit\r\n", 6, 0); //close the connection
                    exit(0);
                }
            }
            printf("%s\n", Buffer);
        }
        else
        {
            /**********************************/
            send(Sck, "EHLO ", 5, 0); //sendsEHLO
            send(Sck, Servidor, strlen(Servidor), 0); //sends EHLO
            send(Sck, "\r\n", 2, 0); //sends EHLO
            if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
            {
                printf("A conexao foi desfeita\n");
                exit(0);
            }
            else
            {
                if(strstr(Buffer, "250")==0)
                {
                    printf("Erro inexperado.\n");
                    send(Sck, "quit\r\n", 6, 0); //close the connection
                    exit(0);
                }
            }
            printf("%s\n", Buffer);
            memset(Buffer, '\0', sizeof(Buffer));

            /**********************************/
            send(Sck, "AUTH LOGIN\r\n", 12, 0); //sends AUTH LOGIN
            printf("\nenviando auth login");
            if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
            {
                printf("A conexao foi desfeita\n");
                exit(0);
            }
            else
            {
                if(strstr(Buffer, "334")==0)
                {
                    printf("Erro inexperado.\n");
                    send(Sck, "quit\r\n", 6, 0); //close the connection
                    exit(0);
                }
            }
            printf("%s\n", Buffer);
            memset(Buffer, '\0', sizeof(Buffer));
            
            /**********************************/
            send(Sck, Usuario, strlen(Usuario), 0); //sends the user
            send(Sck, "\r\n", 2, 0);
            if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
            {
                printf("A conexao foi desfeita\n");
                exit(0);
            }
            else
            {
                if(strstr(Buffer, "334")==0)
                {
                    printf("Erro inexperado.\n");
                    send(Sck, "quit\r\n", 6, 0); //close the connection
                    exit(0);
                }
            }
            printf("%s\n", Buffer);
            memset(Buffer, '\0', sizeof(Buffer));
            
            /**********************************/
            send(Sck, Senha, strlen(Senha), 0); //send the password
            send(Sck, "\r\n", 2, 0);
            printf("\nenviando senha: %s", Senha);
            if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
            {
                printf("A conexao foi desfeita\n");
                exit(0);
            }
            else
            {
                if(strstr(Buffer, "235")==0)
                {
                    printf("Erro inexperado.\n");
                    send(Sck, "quit\r\n", 6, 0); //close the connection
                    //exit(0);
                }
            }
            printf("%s\n", Buffer);
            memset(Buffer, '\0', sizeof(Buffer));
        }
        /**********************************/
        send(Sck, "MAIL FROM: ", 11, 0); //who is sending the mail
        send(Sck, From, strlen(From), 0);
        send(Sck, "\r\n", 2, 0);
        if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
        {
            printf("A conexao foi desfeita\n");
            exit(0);
        }
        else
        {
            if(strstr(Buffer, "250")==0)
            {
                printf("Erro inexperado.\n");
                send(Sck, "quit\r\n", 6, 0); //close the connection
                exit(0);
            }
        }
        printf("%s\n", Buffer);
        memset(Buffer, '\0', sizeof(Buffer));

        /**********************************/
        send(Sck, "RCPT TO: ", 9, 0); //who will receive the mail
        send(Sck, To, strlen(To), 0);
        send(Sck, "\r\n", 2, 0);
        if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
        {
            printf("A conexao foi desfeita\n");
            exit(0);
        }
        else
        {
            if(strstr(Buffer, "250")==0)
            {
                printf("Erro inexperado.\n");
                send(Sck, "quit\r\n", 6, 0); //Fecha a conexao
                exit(0);
            }
        }
        printf("%s\n", Buffer);
        memset(Buffer, '\0', sizeof(Buffer));

        /**********************************/
        send(Sck, "DATA\r\n", 6, 0); //Diz ao servidor que eu estou pronto pra escrever o email
        if((recv(Sck, Buffer, 512, 0))==0) //Verifica a resposta
        {
            printf("A conexao foi desfeita\n");
            exit(0);
        }
        else
        {
            if(strstr(Buffer, "354")==0)
            {
                printf("Erro inexperado.\n");
                send(Sck, "quit\r\n", 6, 0); //Fecha a conexao
                exit(0);
            }
        }
        printf("%s\n", Buffer);
        memset(Buffer, '\0', sizeof(Buffer));

        /**********************************/
        /* thats the header of the mail
         * 
         */
        send(Sck, "From: ", 6, 0);
        send(Sck, From, strlen(From), 0);
        send(Sck, "\r\n", 2, 0);
        
        send(Sck, "To: ", 4, 0);
        send(Sck, To, strlen(To), 0);
        send(Sck, "\r\n", 2, 0);

        send(Sck, "Subject: ", 9, 0);
        send(Sck, Subject, strlen(Subject), 0);
        send(Sck, "\r\n", 2, 0);

        send(Sck, "MIME-Version: 1.0\r\n", 19, 0);
        send(Sck, "Content-Type: multipart/alternative;\r\n", 38, 0);
        send(Sck, "        boundary=----=_Part_1255_4525121.1146192955226\r\n", 56, 0);
        send(Sck, "\r\n", 2, 0);
        send(Sck, "------=_Part_1255_4525121.1146192955226\r\n", 41, 0);
        send(Sck, "Content-Type: text/plain; charset=ISO-8859-1; format=flowed\r\n", 61, 0);
        send(Sck, "Content-Transfer-Encoding: quoted-printable\r\n", 45, 0);
        send(Sck, "Content-Disposition: inline\r\n", 29, 0);
        send(Sck, "\r\n", 2, 0);
        send(Sck, Body, strlen(Body), 0);
        send(Sck, "\r\n", 2, 0);
        send(Sck, "------=_Part_1255_4525121.1146192955226--\r\n", 43, 0);
        send(Sck, ".\r\n", 3, 0);

        if((recv(Sck, Buffer, 512, 0))==0) //Verifica a resposta
        {
            printf("A conexao foi desfeita\n");
            exit(0);
        }
        else
        {
            if(strstr(Buffer, "250")==0)
            {
                printf("Erro inexperado.\n");
                send(Sck, "quit\r\n", 6, 0); //Fecha a conexao
                exit(0);
            }
        }
        printf("%s\n", Buffer);
        send(Sck, "quit\r\n", 6, 0); //Fecha a conexao
        memset(Buffer, '\0', sizeof(Buffer));

        /**********************************/
    }
    return 0;
}




		
---------------------------------
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Re: [Dev-C++] send()/recv() SMTP commands...Ooops

[KrowniX \(\)--\(\) <kr...@ya...>]

Sorry people...

I found out why I can´t send e-mails...it´s becouse the configuration of the proxy that doesn´t allowed smtp communication..

Sorry ..but if anyone wants...knock yourself out with my code...it´s working..

Bye

Kronix

"KrowniX ()--()" <kr...@ya...> escreveu: Hi,

I ´m having trouble in send() and recv() smtp commands, I already write my code, and there´s no error, and works without problems but I still don´t send e-mails...
I´m posting my code here, could you take a look a maybe tell me where I´m wrong?

If someone need the .dev file to try help me, let me know that I will send it to you.

Bye, 

Krownix


#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#include "base64.h"

int Help()
{
    printf("Modo de uso:\n");
    printf("    -h    Help do programa\n");
    printf("    -v    Versão do programa\n\n");
    printf("    -s    IP do servidor SMTP\n");
    printf("    -u    Usuario do servidor SMTP\n");
     printf("    -p    Senha do servidor SMTP\n");
    printf("    -f    Email de quem esta enviando\n");
    printf("    -t    Email de quem irá receber o email\n");
    printf("    -b    Assunto do email\n");
    printf("    -d    Corpo da mensagem\n");
    printf("    -r    Caminho do arquivo que será enviado como corpo\n\n");  
    printf("Lembrando que usando -b e/ou -d será necessario usar o simbolo %20 ao invez de espaço\n\n");
    printf("Exempo:\n");
    printf("emailer -s 209.191.85.254 -u meuuser -p senhateste -f me...@ya... -t meu...@gm... -b Assunto%20do%20meu%20email -r C:\\corpo.txt\n");
    return  0;
}

int Version()
{
    printf("Versao: 0.1\n");
}

char *strreplace(char *str)
{
     char *strf;
     int i, j=0;
     
     strf=malloc(strlen(str) * sizeof(char));
     for(i=0; i<strlen(str); i++)
     {
         if(str[i] == '%')
             if(str[i+1] == '2')
                 if(str[i+2] == '0')
                 {
                     strf[j]='  ';
                     i=i+2;
                     j++;
                     continue;
                 }
         strf[j]=str[i];
         j++;
     }
     strf[j]='\0';
     return strf;
}

int main(int argc, char **argv)
{
     /*if(argc>6)
     {
         Help();
          exit(0);
     }*/

    int i=0, j=0; //Contadores
    char *Servidor, *Usuario, *Senha, *From, *To, *Subject, *Body;
    
    for (i=1; i<argc; i++) //Looping que percorre os argumentos
    {
        switch(argv[i][1]) //Transferencia dos argumentos para as variaveis
        {
            case 'v': //Version. Mostra a versão do programa
                 Version();
                 exit(0);
                  break;
            case 'h': //Help. Chama o Help do programa
                 Help();
                 exit(0);
                 break;
            case 's': //Server. Endereço do servidor
                 i++;
                 Servidor=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(Servidor,  argv[i]);
                 break;
            case 'u': //User. Usuario do servidor
                 i++;
                 Usuario=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(Usuario, argv[i]);
                 break;
            case 'p': //Password. Senha do servidor
                  i++;
                 Senha=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(Senha, argv[i]);
                 break;
            case 'f': //From. Email de quem ta enviando
                i++;
                 From=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(From, argv[i]);
                  break;
            case 't': //To. Email de quem vai receber
                 i++;
                 To=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(To, argv[i]);
                 break;
            case 'b': //Subject. Assunto do email
                 i++;
                 Subject=malloc(strlen(argv[i]) *  sizeof(char));
                 strcpy(Subject, strreplace(argv[i]));
                 break;
            case 'd': //Body. Corpo do email
                 i++;
                 Body=malloc(strlen(argv[i]) * sizeof(char));
                 strcpy(Body, strreplace(argv[i]));
                 break;
            case 'r': //Body. Corpo do email com  arquivo
                 i++;
                 FILE *arq=fopen(argv[i], "r");
                 char ch;
                 if(arq==NULL)
                 {
                     printf("O arquivo referente ao corpo da mensagem não existe, ou não pode ser aberto\n");
                      exit(0);
                 }    
                 
                 while((ch=fgetc(arq))!=EOF) 
                     j++;
                 
                 fseek(arq, -1*j*sizeof(char), 1); 
                 Body=malloc(j * sizeof(char)); 
                  j=0;

                 while((ch=fgetc(arq))!=EOF) //put FILE in Body
                 {
                     Body[j]=ch;
                     j++;
                 }
                 Body[j]='\0';
                 break;
        }
    }

    //crypt pass/user
     if((Usuario!=NULL) && (Senha!=NULL))
    {
        char r[30];
        int res, outlen;
        res=encode64(Usuario, strlen(Usuario), r, strlen(Usuario)*2, &outlen);
        free(Usuario);
        Usuario=malloc(strlen(r) * sizeof(char));
        strcpy(Usuario, r);

        res=encode64(Senha, strlen(Senha), r, strlen(Senha)*2, &outlen);
        free(Senha);
        Senha=malloc(strlen(r) * sizeof(char));
        strcpy(Senha, r);
    }        
    
     
    WSADATA wsadata;
    HOSTENT *HostInfo;
    SOCKET Sck;
    struct sockaddr_in Remote;
    long tmpCon;
    int Conexao;
    char Buffer[512];
    
    if(WSAStartup(MAKEWORD(2,0), &wsadata)!=0) 
    {
        printf("Winsock não encontrado\n");
        exit(0);
    }
    if(LOBYTE(wsadata.wVersion )!=2||HIBYTE(wsadata.wVersion )!=0) 
    {
        printf("Versão do winsock antiga. Atualize o winsock\n");
        exit(0);
    }
    
    Sck=socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
    Remote.sin_family =  AF_INET;
    Remote.sin_port = htons(25);
    Remote.sin_addr.s_addr = inet_addr(Servidor);
    
    
    HostInfo = gethostbyname(Servidor);
    if (HostInfo == NULL)
    {
        printf("Impossivel conectar ao servidor.\n");
        exit(0);
    }
    Conexao=connect(Sck,(struct sockaddr *)&Remote, sizeof(Remote));
    tmpCon = GetTickCount();
    while(Conexao!=0)
        if ((GetTickCount()-tmpCon) > 2500) break;
    
    if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
    {
        printf("A conexao foi  desfeita\n");
        exit(0);
    }
    memset(Buffer, '\0', sizeof(Buffer));
    
    if(Conexao==0)
    {
      if(Usuario==NULL)
        {
            send(Sck, "HELO\r\n", 6, 0);
            printf("enviando helo");
            if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
            {
                printf("A conexao foi desfeita\n");
                 exit(0);
            }
            else
            {
                if(strstr(Buffer, "250")==0)
                {
                    printf("Erro inexperado.\n");
                    send(Sck, "quit\r\n", 6, 0); //close the connection
                    exit(0);
                 }
            }
            printf("%s\n", Buffer);
        }
        else
        {
            /**********************************/
            send(Sck, "EHLO ", 5, 0); //sendsEHLO
            send(Sck, Servidor, strlen(Servidor), 0); //sends EHLO
            send(Sck, "\r\n", 2, 0); //sends EHLO
            if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
             {
                printf("A conexao foi desfeita\n");
                exit(0);
            }
            else
            {
                if(strstr(Buffer, "250")==0)
                {
                    printf("Erro inexperado.\n");
                    send(Sck, "quit\r\n", 6, 0); //close the  connection
                    exit(0);
                }
            }
            printf("%s\n", Buffer);
            memset(Buffer, '\0', sizeof(Buffer));

            /**********************************/
            send(Sck, "AUTH LOGIN\r\n", 12, 0); //sends AUTH LOGIN
            printf("\nenviando auth login");
            if((recv(Sck, Buffer, 512, 0))==0) //check the  recv()
            {
                printf("A conexao foi desfeita\n");
                exit(0);
            }
            else
            {
                if(strstr(Buffer, "334")==0)
                {
                    printf("Erro  inexperado.\n");
                    send(Sck, "quit\r\n", 6, 0); //close the connection
                    exit(0);
                }
            }
            printf("%s\n", Buffer);
            memset(Buffer, '\0', sizeof(Buffer));
            
            /**********************************/
            send(Sck, Usuario, strlen(Usuario), 0); //sends the  user
            send(Sck, "\r\n", 2, 0);
            if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
            {
                printf("A conexao foi desfeita\n");
                exit(0);
            }
            else
            {
                if(strstr(Buffer, "334")==0)
                 {
                    printf("Erro inexperado.\n");
                    send(Sck, "quit\r\n", 6, 0); //close the connection
                    exit(0);
                }
            }
            printf("%s\n", Buffer);
            memset(Buffer, '\0', sizeof(Buffer));
            
             /**********************************/
            send(Sck, Senha, strlen(Senha), 0); //send the password
            send(Sck, "\r\n", 2, 0);
            printf("\nenviando senha: %s", Senha);
            if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
            {
                printf("A conexao foi desfeita\n");
                exit(0);
            }
             else
            {
                if(strstr(Buffer, "235")==0)
                {
                    printf("Erro inexperado.\n");
                    send(Sck, "quit\r\n", 6, 0); //close the connection
                    //exit(0);
                }
            }
             printf("%s\n", Buffer);
            memset(Buffer, '\0', sizeof(Buffer));
        }
        /**********************************/
        send(Sck, "MAIL FROM: ", 11, 0); //who is sending the mail
        send(Sck, From, strlen(From), 0);
        send(Sck, "\r\n", 2, 0);
        if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
        {
            printf("A conexao foi desfeita\n");
            exit(0);
        }
         else
        {
            if(strstr(Buffer, "250")==0)
            {
                printf("Erro inexperado.\n");
                send(Sck, "quit\r\n", 6, 0); //close the connection
                exit(0);
            }
        }
        printf("%s\n", Buffer);
        memset(Buffer, '\0', sizeof(Buffer));

         /**********************************/
        send(Sck, "RCPT TO: ", 9, 0); //who will receive the mail
        send(Sck, To, strlen(To), 0);
        send(Sck, "\r\n", 2, 0);
        if((recv(Sck, Buffer, 512, 0))==0) //check the recv()
        {
            printf("A conexao foi desfeita\n");
            exit(0);
        }
        else
        {
            if(strstr(Buffer, "250")==0)
             {
                printf("Erro inexperado.\n");
                send(Sck, "quit\r\n", 6, 0); //Fecha a conexao
                exit(0);
            }
        }
        printf("%s\n", Buffer);
        memset(Buffer, '\0', sizeof(Buffer));

        /**********************************/
        send(Sck, "DATA\r\n", 6, 0); //Diz ao servidor que eu estou pronto pra escrever o email
        if((recv(Sck, Buffer, 512, 0))==0) //Verifica a  resposta
        {
            printf("A conexao foi desfeita\n");
            exit(0);
        }
        else
        {
            if(strstr(Buffer, "354")==0)
            {
                printf("Erro inexperado.\n");
                send(Sck, "quit\r\n", 6, 0); //Fecha a conexao
                 exit(0);
            }
        }
        printf("%s\n", Buffer);
        memset(Buffer, '\0', sizeof(Buffer));

        /**********************************/
        /* thats the header of the mail
         * 
         */
        send(Sck, "From: ", 6, 0);
        send(Sck, From, strlen(From), 0);
        send(Sck, "\r\n", 2, 0);
        
        send(Sck, "To: ", 4, 0);
        send(Sck, To, strlen(To),  0);
        send(Sck, "\r\n", 2, 0);

        send(Sck, "Subject: ", 9, 0);
        send(Sck, Subject, strlen(Subject), 0);
        send(Sck, "\r\n", 2, 0);

        send(Sck, "MIME-Version: 1.0\r\n", 19, 0);
        send(Sck, "Content-Type: multipart/alternative;\r\n", 38, 0);
        send(Sck, "        boundary=----=_Part_1255_4525121.1146192955226\r\n", 56, 0);
        send(Sck, "\r\n", 2, 0);
        send(Sck, "------=_Part_1255_4525121.1146192955226\r\n", 41, 0);
        send(Sck, "Content-Type: text/plain; charset=ISO-8859-1; format=flowed\r\n", 61,  0);
        send(Sck, "Content-Transfer-Encoding: quoted-printable\r\n", 45, 0);
        send(Sck, "Content-Disposition: inline\r\n", 29, 0);
        send(Sck, "\r\n", 2, 0);
        send(Sck, Body, strlen(Body), 0);
        send(Sck, "\r\n", 2, 0);
        send(Sck, "------=_Part_1255_4525121.1146192955226--\r\n", 43, 0);
        send(Sck, ".\r\n", 3, 0);

        if((recv(Sck, Buffer, 512, 0))==0) //Verifica a resposta
        {
            printf("A conexao foi desfeita\n");
             exit(0);
        }
        else
        {
            if(strstr(Buffer, "250")==0)
            {
                printf("Erro inexperado.\n");
                send(Sck, "quit\r\n", 6, 0); //Fecha a conexao
                exit(0);
            }
        }
        printf("%s\n", Buffer);
        send(Sck, "quit\r\n", 6, 0); //Fecha a  conexao
        memset(Buffer, '\0', sizeof(Buffer));

        /**********************************/
    }
    return 0;
}



   

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