POP3 SSH Tunneling (Port Forwarding)

Demonstrates how to connect to a POP3 server through an SSH tunnel. Reads a POP3 mailbox and display the FROM and SUBJECT header fields of each email.

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use chilkat();

#  The mailman object is used for receiving (POP3)
#  and sending (SMTP) email.
$mailman = new chilkat::CkMailMan();

#  Any string argument automatically begins the 30-day trial.
$success = $mailman->UnlockComponent("30-day trial");
if ($success != 1) {
    print "Component unlock failed" . "\n";
    exit;
}

#  Connect to an SSH server and establish the SSH tunnel:

#  The SSH hostname may be a hostname or an
#  IP address, such as "192.168.1.108".
#  The port is typically 22 (the standard port for SSH).
$sshHostname = "www.my-ssh-server.com";
$sshPort = 22;
#  Select POP3 by setting the following variable to 0
$bForSmtp = 0;
#  The 1st argument passed to SshTunnel indicates whether
#  a tunnel for SMTP or POP3 is being established.
$success = $mailman->SshTunnel($bForSmtp,$sshHostname,$sshPort);
if ($success != 1) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

#  Authenticate with the SSH server via a login/password
#  or with a public key.
#  This example demonstrates SSH password authentication.
#  Note: This is not authenticating with the POP3 server, it is
#  for authenticating with the SSH server, which is separate.
$success = $mailman->SshAuthenticatePw($bForSmtp,"ssh_login","ssh_password");
if ($success != 1) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

#  OK, the SSH tunnel is setup.  The mailman may
#  be used exactly the same as usual, except all communications
#  are now sent through the SSH tunnel.

#  Set the POP3 server's hostname
$mailman->put_MailHost("mail.chilkatsoft.com");

#  Set the POP3 login/password.
$mailman->put_PopUsername("pop3_login");
$mailman->put_PopPassword("pop3_password");

#  Download a max of 5 messages
#  To download all email, leave MaxCount unset so it remains at the default value of 0.
$mailman->put_MaxCount(5);

#  Copy the all email from the user's POP3 mailbox
#  into a bundle object.  The email remains on the server.
# bundle is a CkEmailBundle
$bundle = $mailman->CopyMail();

#  If you're curious, have a look at LastErrorText after
#  a successful send.  You'll see detailed information that
#  confirms the SSH tunneling.
print $mailman->lastErrorText() . "\n";

if ($bundle eq null ) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

for ($i = 0; $i <= $bundle->get_MessageCount() - 1; $i++) {
    # email is a CkEmail
    $email = $bundle->GetEmail($i);
    print $email->ck_from() . "\r\n";
    print $email->subject() . "\r\n" . "\r\n";

}

#  Close the connection (with both SSH server and POP3 server)
$mailman->Pop3EndSession();