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From: Noel Jones on 28 Jan 2010 08:53
On 1/28/2010 1:17 AM, Eero Volotinen wrote:
> Hi All,
>
> Very intresting problem from my postfix server to BorderWare MXtreme
> Mail Firewall SMTP 1)
>
> In some rare case remote smtp server replies: said: 451 Error:
> internal error 512 (in reply to end of DATA command))
>
> I think this is bug on BorderWare MXtreme Mail Firewall SMTP server?,
> but how to debug the cause of this? How to take packet trace from this
> message that fails?

First, is there any logging or other diagnostic information
available from the BorderWare device? That's probably the
best source of information on what the problem is.

You should try to get a packet trace of a failed message. I
expect it will show a completely normal SMTP session where the
remote side responds "451 Err..." and then disconnects, but
it's prudent to verify that.
http://www.postfix.org/DEBUG_README.html#sniffer

If the BroderWare box is yours, you need to contact their tech
support. This doesn't sound like a postfix problem.

-- Noel Jones

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