PHP

Send a Raw SMTP Command

Demonstrates the Chilkat MailMan.SmtpSendRawCommand method, which sends a raw command to the SMTP server and returns the server's response. The second argument specifies the charset to use if the command contains non-US-ASCII characters, and the third indicates whether to base64-encode the command before sending. This example sends a raw NOOP on an open connection.

Background: SMTP is a line-based text protocol (EHLO, MAIL FROM, RCPT TO, DATA, QUIT), so a raw-command hook lets you issue anything Chilkat doesn't wrap — a server extension, or a custom step during a manual auth exchange. The base64 flag exists because some SMTP exchanges (notably AUTH challenge/response) require the argument to be base64-encoded on the wire.

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Chilkat2 PHP

<?php

use Chilkat2\MailMan;

// Demonstrates the MailMan.SmtpSendRawCommand method, which sends a raw command to the SMTP
// server and returns the server's response.  The 2nd argument is the charset used if the
// command contains non-US-ASCII characters, and the 3rd indicates whether to base64-encode
// the command before sending.

$mailman = new MailMan();

// Configure the SMTP server connection.
$mailman->SmtpHost = 'smtp.example.com';
$mailman->SmtpPort = 465;
$mailman->SmtpSsl = true;
$mailman->SmtpUsername = 'user@example.com';
$mailman->SmtpPassword = 'myPassword';

try {
    $mailman->OpenSmtpConnection();

    // Send the raw SMTP NOOP command (not base64-encoded).
    $response = $mailman->SmtpSendRawCommand('NOOP', 'us-ascii', false);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'NOOP response: ', $response, "\n";

try {
    $mailman->CloseSmtpConnection();
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}