PHPMailer NTLM (MS Exchange) SMTP authentication

PHPmailer does not work with NTLM authentication and insists on using mhash() which is deprecated – so you need to edit the file in /extras called ntlm_sasl_client.php

Find the code that checks if mhash() is installed and replace the 3 mhashes with hash instead:

|| !function_exists($function = "mhash")
) {
$extensions = array(
"mcrypt_encrypt" => "mcrypt",
"mhash" => "mhash"

Then replace these three lines:

$unicode = $this->ASCIIToUnicode($password);
$md4 = mhash(MHASH_MD4, $unicode);
$padded = $md4 . str_repeat(chr(0), 21 - strlen($md4));

With the following:

$unicode = iconv('UTF-8', 'UTF-16LE', $password);
$padded = pack('H*', hash('md4', $unicode));

And the library now works. When sending you will need to define a couple of extra bits:

$mail->SMTPSecure = 'ntlm';
$mail->Realm = "yourdomain.com";
$mail->Workstation = "WORKSTATION1";

…obviously replacing the domain and workstation name with your own values.

Process email bounces with PHP

This is a quick script to process email bounces, for example from a mailing list so that users can be flagged up or unsubscribed when they have too many failures.

The actual bounce identification will be done by Chris Fortune’s Bounce Handler, which you can download from:
http://anti-spam-man.com/php_bouncehandler/

We require 3 files from that package:
bounce_driver.class.php
bounce_responses.php
rfc1893.error.codes.php

What this script does is get the bounced emails from a specified mailbox and counts up how many failed emails there are per email address – if the number is at least as many as your threshold value (called $delete), then (you insert your code to unsubscribe the email address or whatever etc. and) the bounced emails are then deleted. You can run the script as a cronjob or call from your mailing list script to tidy up subscriptions.

<?php

# define variables
$mail_box = '{mail.domain.com:143/novalidate-cert}'; //imap example
$mail_user = 'username'; //mail username
$mail_pass = 'password'; //mail password
$delete = '5'; //deletes emails with at least this number of failures

# connect to mailbox
$conn = imap_open ($mail_box, $mail_user, $mail_pass) or die(imap_last_error());
$num_msgs = imap_num_msg($conn);

# start bounce class
require_once('bounce_driver.class.php');
$bouncehandler = new Bouncehandler();

# get the failures
$email_addresses = array();
$delete_addresses = array();
  for ($n=1;$n<=$num_msgs;$n++) {
  $bounce = imap_fetchheader($conn, $n).imap_body($conn, $n); //entire message
  $multiArray = $bouncehandler->get_the_facts($bounce);
    if (!empty($multiArray[0]['action']) && !empty($multiArray[0]['status']) && !empty($multiArray[0]['recipient']) ) {
      if ($multiArray[0]['action']=='failed') {
      $email_addresses[$multiArray[0]['recipient']]++; //increment number of failures
      $delete_addresses[$multiArray[0]['recipient']][] = $n; //add message to delete array
      } //if delivery failed
    } //if passed parsing as bounce
  } //for loop

# process the failures
  foreach ($email_addresses as $key => $value) { //trim($key) is email address, $value is number of failures
    if ($value>=$delete) {
    /*
    do whatever you need to do here, e.g. unsubscribe email address
    */
    # mark for deletion
      foreach ($delete_addresses[$key] as $delnum) imap_delete($conn, $delnum);
    } //if failed more than $delete times
  } //foreach

# delete messages
imap_expunge($conn);

# close
imap_close($conn);

?>

Monitor server cpu resources with email notification

I thought I’d write a quick script to keep an eye on which processes/users are using too many cpu cycles on my CentOS server. This checks the usage over the previous 5 minutes and emails a detailed list of cpu-hungry processes if it’s over the defined limit. Run it from cron to keep an eye on those resources:

#!/bin/bash
CPU_LIMIT="10" # relevant to number of cores, so quad-core at capacity is 4
EMAIL="your@email.com"
  if [ $(echo "$(cat /proc/loadavg | cut -d " " -f 2) >= $CPU_LIMIT" | bc) = 1 ]; then
ps ax --sort=-pcpu o user,pid,pcpu,pmem,vsz,rss,stat,time,comm | mail -s "CPU OVER LIMIT ON `hostname`" $EMAIL
  fi

That’s all folks!

RAID error email reporting with the 3ware 9550SXU-8L and tw_cli

This is a follow up to my previous post dmraid error reporting by email, this time for a hardware raid controller, this one is the 3ware/AMCC 9550SXU-8L. The concept is exactly the same, the only thing different is the script that checks the raid array status.

We will be using the command line tool tw_cli – which can be downloaded from www.3ware.com (now LSI) – go to support and select your product, then download the command line tools zip (which is currently CLI Linux – 10.2 code set). In this example, the tw_cli file has been extracted to / and chmodded 755.

Follow the other post and instead of inserting the other script insert this:

#!/bin/sh
# check raid status and email if not ok
STATUS=`/tw_cli info c0 | grep "RAID"`
OK=`echo "$STATUS" | grep "OK"`
if [ "$STATUS" != "$OK" ]
then
/tw_cli info c0 | mail -s "RAID ERROR ON `hostname`" your@email.com
fi

This works for my setup using the 10.2 version of the command line tools. I have 2 separate raid arrays on the card (which is why I queried all lines that have the word “RAID” on them and then check they also have the word “OK” on them). If your card is positioned differently or you have multiple cards you may need to change the command line options.