Unicode C++

Send Email to Distribution List

See more SMTP Examples

Sends the same email to a list of 1000 email addresses in 50 sends where each email has 20 recipients.

Note: Chilkat is not intended nor designed for mass emailing. A solution such as this might be used for a corporate emailing to employees, or an emailing to newsletter subscribers.

Unicode C++

#include <CkMailManW.h>
#include <CkEmailW.h>
#include <CkBinDataW.h>
#include <CkStringTableW.h>
#include <CkStringBuilderW.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkMailManW mailman;

    mailman.put_SmtpHost(L"smtp.mymailserver.com");
    mailman.put_SmtpPort(465);
    mailman.put_SmtpSsl(true);
    mailman.put_SmtpUsername(L"myUsername");
    mailman.put_SmtpPassword(L"myPassword");

    // Create a new email object
    CkEmailW email;
    email.put_Subject(L"This is a test");
    email.put_Body(L"This is a test");
    email.put_From(L"Senders Name <sender@example.com>");
    email.AddTo(L"Subscribers",L"subscribers@example.com");

    CkBinDataW bdMime;
    mailman.RenderToMimeBd(email,bdMime);

    // Load a file containing one email address per line.
    CkStringTableW distList;
    success = distList.AppendFromFile(1000,L"utf-8",L"qa_data/distList.txt");
    if (success == false) {
        wprintf(L"%s\n",distList.lastErrorText());
        return;
    }

    CkStringBuilderW sbRecipients;

    int i = 0;
    int szDistList = distList.get_Count();
    int j = 0;
    while (i < szDistList) {

        // Build a list of comma-separated recipients.
        if (j > 0) {
            sbRecipients.Append(L",");
        }

        sbRecipients.Append(distList.stringAt(i));

        i = i + 1;
        j = j + 1;

        // If we have 20 recipients, or we have the final recipient in the final chunk, then send.
        if ((j == 20) || (i == szDistList)) {
            success = mailman.SendMimeBd(L"sender@example.com",sbRecipients.getAsString(),bdMime);
            if (success != true) {
                wprintf(L"%s\n",mailman.lastErrorText());
                return;
            }

            j = 0;
            sbRecipients.Clear();
        }

    }

    success = mailman.CloseSmtpConnection();
    if (success != true) {
        wprintf(L"Connection to SMTP server not closed cleanly.\n");
    }

    wprintf(L"Email sent to distirbution list.\n");
    }