exchange-server


Barracuda not delivering external email


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The firmware is ridiculously out of date, 4.0.1.009, the powers that be, just don't want to spend the money to update it.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

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