Send a POP3 NOOP Command

See more POP3 Examples

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.

Chilkat C Downloads

Download Chilkat for C

#include <C_CkMailMan.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkMailMan 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 = CkMailMan_Create();

    //  Configure the POP3 server connection.
    CkMailMan_putMailHost(mailman,"pop.example.com");
    CkMailMan_putMailPort(mailman,995);
    CkMailMan_putPopSsl(mailman,TRUE);
    CkMailMan_putPopUsername(mailman,"user@example.com");
    CkMailMan_putPopPassword(mailman,"myPassword");

    //  Begin a POP3 session.

    success = CkMailMan_Pop3BeginSession(mailman);
    if (success == FALSE) {
        printf("%s\n",CkMailMan_lastErrorText(mailman));
        CkMailMan_Dispose(mailman);
        return;
    }

    //  Send a NOOP to keep the session alive.
    success = CkMailMan_Pop3Noop(mailman);
    if (success == FALSE) {
        printf("%s\n",CkMailMan_lastErrorText(mailman));
        CkMailMan_Dispose(mailman);
        return;
    }

    printf("POP3 NOOP succeeded.\n");


    CkMailMan_Dispose(mailman);

    }