(PHP Extension) SMTP Inspection

See more SMTP Examples

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux

<?php

include("chilkat.php");

$success = false;

$mailman = new CkMailMan();

$mailman->put_SmtpHost('smtp.example.com');
$mailman->put_SmtpUsername('myUsername');
$mailman->put_SmtpPassword('myPassword');

$mailman->put_SmtpPort(465);
$mailman->put_StartTLS(true);

$email = new CkEmail();

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

// Generate the MIME that is sent when SendEmail is called
$mimeStr = $mailman->renderToMime($email);
print $mimeStr . "\n";

$success = $mailman->SendEmail($email);
if ($success == false) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

$success = $mailman->CloseSmtpConnection();
if ($success != true) {
    print 'Connection to SMTP server not closed cleanly.' . "\n";
}

// Examine the SMTP session log.
print '----' . "\n";
print 'Smtp Session Log:' . "\n";
print $mailman->smtpSessionLog() . "\n";

// ---------------------------------------------------
// 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

?>