(Unicode C++) IMAP STARTTLS (Explicit TLS/SSL)

The StartTls property is set to force the Connect method to automatically convert an connection to TLS/SSL via the STARTTLS IMAP command.

This is also known as "explicit TLS/SSL" as opposed to "implicit TLS/SSL". With implicit TLS/SSL, the IMAP client connects on the well-known IMAP TLS/SSL port 993 and the secure channel is immediately established. With explicit TLS/SSL, the IMAP client connects on the typical non-secure port (143 usually) and the converts the connection via the STARTTLS command.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <CkImapW.h>
#include <CkMessageSetW.h>
#include <CkEmailBundleW.h>
#include <CkEmailW.h>

void ChilkatSample(void)
    {
    bool success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkImapW imap;

    // Indicate that STARTTLS should be used to convert
    // to a secure TLS/SSL connection:
    imap.put_StartTls(true);
    imap.put_Port(143);

    // Connect to an IMAP server and convert the connection
    // to TLS/SSL via STARTTLS.
    success = imap.Connect(L"imap.example.com");
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    // The remainder of this example is the same as for 
    // non-TLS/SSL...

    // Login
    success = imap.Login(L"myLogin",L"myPassword");
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    // Select an IMAP mailbox
    success = imap.SelectMailbox(L"Inbox");
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    // Get the message IDs of all the emails in the mailbox
    bool fetchUids = true;
    CkMessageSetW messageSet;
    success = imap.QueryMbx(L"ALL",fetchUids,messageSet);
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    // Fetch the emails into a bundle object:
    CkEmailBundleW bundle;
    bool headersOnly = false;
    success = imap.FetchMsgSet(headersOnly,messageSet,bundle);
    if (success == false) {
        wprintf(L"%s\n",imap.lastErrorText());
        return;
    }

    // Loop over the bundle and display the FROM and SUBJECT of each.
    CkEmailW email;
    int i = 0;
    int numEmails = bundle.get_MessageCount();
    while (i < numEmails) {
        bundle.EmailAt(i,email);

        wprintf(L"%s\n",email.ck_from());
        wprintf(L"%s\n",email.subject());
        wprintf(L"--\n");
        i = i + 1;
    }

    // Disconnect from the IMAP server.
    success = imap.Disconnect();
    }