(Unicode C++) SMTP Inspection

See more SMTP Examples

Chilkat C/C++ Library Downloads
MS Visual C/C++ C++ Builder Linux C/C++ Alpine Linux C/C++	MacOS C/C++ iOS C/C++ Android C/C++ MinGW C/C++

#include <CkMailManW.h>
#include <CkEmailW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkMailManW mailman;

    mailman.put_SmtpHost(L"smtp.example.com");
    mailman.put_SmtpUsername(L"myUsername");
    mailman.put_SmtpPassword(L"myPassword");

    mailman.put_SmtpPort(465);
    mailman.put_StartTLS(true);

    CkEmailW email;

    email.put_Subject(L"This is a test");
    email.put_Body(L"This is a test");
    email.put_From(L"Alex <alex@example.com>");
    email.AddTo(L"Christoph",L"christoph@example2.com");
    email.AddBcc(L"Victor",L"victor@example3.com");

    // Generate the MIME that is sent when SendEmail is called
    const wchar_t *mimeStr = mailman.renderToMime(email);
    wprintf(L"%s\n",mimeStr);

    success = mailman.SendEmail(email);
    if (success == false) {
        wprintf(L"%s\n",mailman.lastErrorText());
        return;
    }

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

    // Examine the SMTP session log.
    wprintf(L"----\n");
    wprintf(L"Smtp Session Log:\n");
    wprintf(L"%s\n",mailman.smtpSessionLog());

    // ---------------------------------------------------
    // Sample output:
    // ---------------------------------------------------

    // MIME-Version: 1.0
    // Date: Fri, 06 Mar 2026 16:21:00 -0600
    // Message-ID: <A5DC25990C93EC2676F4FBB2BB3BFA9EB34FF9D3@CHILKAT25>
    // Content-Type: text/plain; charset=us-ascii; format=flowed
    // Content-Transfer-Encoding: 7bit
    // X-Priority: 3 (Normal)
    // Subject: This is a test
    // From: Alex <alex@example.com>
    // To: Christoph <christoph@example2.com>
    // Bcc: Victor <victor@example3.com>
    // 
    // This is a test
    // ----
    // Smtp Session Log:
    // 220 smtp.example.com ESMTP Amazon WorkMail SMTP Service
    // EHLO MYCOMPUTER<CRLF>
    // 250-smtp.example.com
    // 250-8BITMIME
    // 250-AUTH PLAIN LOGIN
    // 250 Ok
    // AUTH LOGIN<CRLF>
    // 334 VXNlcm5hbWU6
    // YWRtaW5AY2hpbGthdHNvZnQuY29t<CRLF>
    // 334 UGFzc3dvcmQ6
    // {PasswordOrCredentials}
    // 235 Authentication successful.
    // MAIL FROM:<alex@example.com><CRLF>
    // 250 Ok
    // RCPT TO:<christoph@example2.com><CRLF>
    // 250 Ok
    // RCPT TO:<victor@example3.com><CRLF>
    // 250 Ok
    // DATA<CRLF>
    // 354 End data with <CR><LF>.<CR><LF>
    // {388 bytes} <--- The MIME source of the email (examined via RenderToMime) was sent here.
    // <CRLF>.<CRLF>
    // 250 Ok
    // QUIT<CRLF>
    // 221 Bye
    }