On Fri, 2010-07-09 at 11:44 +0800, Emmanuel Noobadmin wrote:
{snip}
> Current setup
>
> Customer (dynamic IP from their ISP) -> Customer Exim/Mail Server (in
> data center with static IP) -> Intended mail recipient server (using
> Barracuda)
>
> Barracuda is rejecting the emails based on the Customer IP, not the
> mail server IP. The bounced mail includes a link to Barracuda's site
> with that dynamic IP embedded in the link.
>
> Using mxtoolbox's blacklist check, the Server IP is not blacklisted
> anywhere not even Barracuda. So it's certain that Barracuda is
> blocking based on the sender's ADSL IP.
>
As Phil pointed out, you need to speak with the owner of the Barracuda.
They have probably mis-configured it leaving the 'deep header scanning'
feature on where it should not be. There is, however, the possibility
they may have set up a rule on that Barracuda to block your customer
specifically.
Chances are they will be loosing significant amounts of genuine mail at
this time. Emmanuel, have the Barracuda check this and turn it
off/uncheck it -
DEEP HEADER SCAN V4x
Menu: Block/Accept > IP REPUTATION > (third item down) DEEP HEADER SCAN
http://bayimg.com/kanPjaACI
DEEP HEADER SCAN V3x
Menu: Block/Accept > IP REPUTATION > (third item down) DEEP HEADER SCAN
http://bayimg.com/kANPmAAcI
