How to attach the txt file using smtp in vc 6.0

Question

we able to send the simple email. but we need to send the email with an file attachment using smtp in vc 6.0.

bool SendMail()
{
if (!ValidateEnvelope(sendmail.host, sendmail.recip, 
    sendmail.sender, &sendmail.IP)) return false;

char tmp[255];
if (sendmail.sender=="" || sendmail.recip=="" ||
    sendmail.body=="" || sendmail.subject=="") return false;

sendmail.hSocket=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sendmail.hSocket==SOCKET_ERROR) return false; 

if (!ConnectTo())
{
    printf("Unable to connect to the server.\n");
    return false;
}
snd("HELO", true);

sprintf(tmp, "%s%s%s", "MAIL FROM:<", sendmail.sender, ">");
snd(tmp, true);
sprintf(tmp, "%s%s%s", "RCPT TO:<", sendmail.recip, ">");
snd(tmp, true);

sprintf(tmp, "%s%s%s", "MAIL FROM:<", sendmail.sender, ">");
snd(tmp, true);
sprintf(tmp, "%s%s%s", "RCPT TO:<", sendmail.recip, ">");
snd(tmp, true);
snd("DATA", true);
sprintf(tmp, "%s%s", "From: ", sendmail.sender);
snd(tmp, false);
sprintf(tmp, "%s%s", "To: ", sendmail.recip);
snd(tmp, false);
sprintf(tmp, "%s%s", "Subject: ", sendmail.subject);
snd(tmp, false);
snd("", false);
snd(sendmail.body ,false);
snd(".", true);

snd("NOOP", true);
snd("QUIT", true);
closesocket(sendmail.hSocket);

return true;
}

How to attach the file in above code. Thanks in advance.

Answer 1

Why don't you just use Simple MAPI like this:

    HINSTANCE hlibMAPI;
    LPMAPISENDMAIL lpMAPISendMail;
    MapiMessage msg;
    MapiRecipDesc recipient, sender;

    hlibMAPI = LoadLibrary("MAPI32.DLL");
    if (!hlibMAPI)
    {
        AfxMessageBox("Error while sending E-Mail: Can't load MAPI32.DLL");
        return;
    }

    lpMAPISendMail= (LPMAPISENDMAIL)GetProcAddress(hlibMAPI, "MAPISendMail");
    if (!lpMAPISendMail)
    {
        AfxMessageBox("Error while sending E-Mail: Can't locate function 'MAPISendMail' in 'MAPI32.DLL'");
        return;
    }

    long l = 123456;
    unsigned long ul;

    sender.ulReserved = NULL;   
    sender.ulRecipClass = MAPI_ORIG; 
    sender.lpszName = "generic"; 
    sender.lpszAddress = "SMTP:generic@sender.org";  
    sender.ulEIDSize = 4; 
    sender.lpEntryID = &l;    

    recipient.ulReserved = NULL;   
    recipient.ulRecipClass = MAPI_TO; 
    recipient.lpszName = "dummy recipient"; 
    char eadr[200];
    strcpy(eadr, "SMTP:dummy@recipient.org");
    recipient.lpszAddress = eadr;  
    recipient.ulEIDSize = 4; 
    recipient.lpEntryID = &l;    

    // setup message body
    msg.ulReserved = NULL;      
    msg.lpszSubject = "sample subject";      
    msg.lpszNoteText = "sample text";      
    msg.lpszMessageType = NULL; 
    msg.lpszDateReceived = "2013/10/31 00:00"; 
    msg.lpszConversationID = NULL;      
    msg.flFlags = MAPI_RECEIPT_REQUESTED;      
    msg.lpOriginator = &sender; 
    msg.nRecipCount = 1;      
    msg.lpRecips = &recipient;      
    msg.nFileCount = 0;   /// <-- use this to attach your file
    msg.lpFiles = NULL;   //         

    ul = (*lpMAPISendMail)(NULL, (ULONG)AfxGetMainWnd(), &msg, MAPI_LOGON_UI, NULL);
    FreeLibrary(hlibMAPI);

    switch (ul)
    {
    case MAPI_E_LOGIN_FAILURE:
        AfxMessageBox("Error while sending E-Mail: Coldn't login");
        return;

    case MAPI_E_INSUFFICIENT_MEMORY:
        AfxMessageBox("Error while sending E-Mail: There was insufficient memory to send the e-mail");
        return;

    case MAPI_E_USER_ABORT:
        AfxMessageBox("User canceled mail creation");
        return;

    case SUCCESS_SUCCESS:
        AfxMessageBox("E-mail was sent successfully");
        break;

    default:
        AfxMessageBox("Unknown error while sending E-Mail");
        return;
    }

Answer 2

I would advise you to use a standard library. I would prefer this one.

Else copy the required code from the project.