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Jasoomian
Asked: 2012-04-05 07:05:16 +0800 CST

Barracuda not delivering external email

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I have a Barracuda 300, sometime yesterday afternoon, roughly 5:30, the Barracuda stopped delivering external emails to our exchange users and instead, it began marking all those messages as 'deferred' and a reason as 'Invalid Recipient.'

We have had issues with this Barracuda in the past, and normally, just a little reboot and it would eventually start delivering the mail that is in the queue, as of 9:44AM, the mail/log storage is at 75%. The System Load is under <1%, and the firmware storage is at 37%.

I'm looking for other things that I can check, I've exhausted my knowledge on differing things to try, while, not a lot, I've covered the aspects of what I know to check, I'm just not that familiar with the Barracuda prodcuts:

  • I can ping our exchange server from the Barracuda
  • I've rebooted the Barracuda several times
  • A Dig/NsLookup against our exchange server is successful

A part of me just thinks that since the mail/log storage is so large, that it will just take some time before everything is back to normal, but, it's been about three hours so far, and the mail/log storage is slowly growing larger.

The firmware is ridiculously out of date, 4.0.1.009, the powers that be, just don't want to spend the money to update it.

Any help, even if it's just 'be patient, let it do it's thing', would be greatly appreciated.

Thanks.

exchange barracuda

1 Answers

  1. Best Answer

    Well, you have a few odd issues. Given the old firmware, you're subject to a massive bug related to the Spamassassin filter used by the Barracuda. This bug basically bricks all appliances that have a firmware older than January 2012. Anyone with an older firmware is referred to the Barracuda renewals department.

    The current firmware is 5.1.1.xxx. Your vitals are fine in terms of CPU usage and disk utilization. The storage on a busy unit plateaus at 75% and logs/etc are rotated to keep things at that level.

    You should check to see if you have LDAP integration enabled on your Barracuda.

    That should be Domains -> Domain Manager -> yourdomain.com -> Users -> LDAP Configuration

    For the time being, change Exchange Accelerator/LDAP Verification: to NO if it's enabled. If you did have it enabled, check your LDAP bind username and password.

    If that's not the case, then check the main system configuration.

    Basic -> IP Configuration -> Destination Mail Server TCP/IP Configuration.

    Change that field to the IP of your Exchange system and input a test address on your network. Run the SMTP test. The output should end with:

    From: <[email protected]> 
Date: Wed Apr 4 08:19:55 2012 
Subject: Test message 

This is a test message from your Barracuda Spam & Virus Firewall. 
. 
250 2.6.0 <[email protected]> [InternalId=466] Queued mail for delivery

    Do you have a VMware environment? If so, I would suggest dumping the hardware unit at this point and picking up an evaluation of the Barracuda VX300 virtual appliance. It's far cheaper and faster than the hardware and you can run it for 30 days while "the powers that be" decide on whether they value spam filtering. You won't get support from Barracuda on your existing hardware without paying back to the date that the initial contract ended. It's their policy.

    Also see: What to do with an out-of-warranty Barracuda Spam/Web filter?

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