PHP

Use an Existing Socket SSH Tunnel

Demonstrates the Chilkat MailMan.UseSshTunnel method, which configures MailMan to use an existing SSH tunnel provided by a Socket object for its SMTP and POP3 connections. This example opens and authenticates a tunnel on a Socket, hands it to MailMan, and then verifies an SMTP login through it.

Background: Sharing one already-established SSH tunnel across objects avoids opening (and authenticating) a separate SSH connection for every component that needs to reach the remote network. Here the tunnel lives on a Socket object, which MailMan then routes its SMTP/POP3 traffic through. It is the Socket-based sibling of UseSsh, which shares an Ssh object instead.

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Chilkat2 PHP

<?php

use Chilkat2\MailMan;
use Chilkat2\Socket;

$success = false;

// Demonstrates the MailMan.UseSshTunnel method, which configures MailMan to use an existing
// SSH tunnel provided by a Socket object for its SMTP and POP3 connections.

// Open and authenticate the SSH tunnel using a Socket object.
$sshTunnel = new Socket();
try {
    $sshTunnel->SshOpenTunnel('ssh.example.com', 22);

    $sshTunnel->SshAuthenticatePw('sshUser', 'sshPassword');

    $mailman = new MailMan();

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

    // Tell MailMan to route its connections through the existing tunnel.
    $mailman->UseSshTunnel($sshTunnel);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// SMTP operations now travel through the shared SSH tunnel.
$success = $mailman->VerifySmtpLogin();
if (!$success) {
    echo $mailman->LastErrorText, "\n";
    exit;
}

echo "Authenticated with the SMTP server through the SSH tunnel.\n";