Unicode C

Send a POP3 NOOP Command

Demonstrates the Chilkat MailMan.Pop3Noop method, which sends a POP3 NOOP command to the server. NOOP does nothing except elicit a positive response, which is useful for keeping a session alive or verifying the connection is still responsive. This example begins a POP3 session and sends a NOOP.

Background: NOOP ("no operation") is a standard keep-alive across many internet protocols. Servers often drop idle connections after a timeout; sending a periodic NOOP resets that timer so a long-running session stays open. It also serves as a cheap "are you still there?" probe — a successful reply confirms the socket and the authenticated session are still healthy.

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Unicode C

#include <C_CkMailManW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkMailManW mailman;

    success = FALSE;

    //  Demonstrates the MailMan.Pop3Noop method, which sends a POP3 NOOP command to the server.
    //  NOOP does nothing except elicit a positive response, which is useful for keeping a
    //  session alive or verifying the connection is still responsive.

    mailman = CkMailManW_Create();

    //  Configure the POP3 server connection.
    CkMailManW_putMailHost(mailman,L"pop.example.com");
    CkMailManW_putMailPort(mailman,995);
    CkMailManW_putPopSsl(mailman,TRUE);
    CkMailManW_putPopUsername(mailman,L"user@example.com");
    CkMailManW_putPopPassword(mailman,L"myPassword");

    //  Begin a POP3 session.

    success = CkMailManW_Pop3BeginSession(mailman);
    if (success == FALSE) {
        wprintf(L"%s\n",CkMailManW_lastErrorText(mailman));
        CkMailManW_Dispose(mailman);
        return;
    }

    //  Send a NOOP to keep the session alive.
    success = CkMailManW_Pop3Noop(mailman);
    if (success == FALSE) {
        wprintf(L"%s\n",CkMailManW_lastErrorText(mailman));
        CkMailManW_Dispose(mailman);
        return;
    }

    wprintf(L"POP3 NOOP succeeded.\n");


    CkMailManW_Dispose(mailman);

    }