Mailenable Bans (blacklists) domain

[DWSupport]

We have a mail server with ME set up and we are having a hard time the last week since no email set up on ME can send emails to a specific domain (the second domain is not ours).
We have tried sending emails to that domain using other accounts ( hotmail and gmail ) and we did not receive an error which seems to indicate that the issue is with our server and mailenable.

We have tried to find a blacklist but it was empty.

We have also added that domain to the whitelist but that did not help.

We also opened the SMTP TAB DENY file and we noticed that we have 4 lines in there and one is the local IP and the other is the outside IP of the mailserver. Is this normal?


This is the error that is returned (details had to be changed due to company's security policy):

MailEnable: Message Delivery Failure.

Reason: ME-E0193: [24C62416B9754F61AA90502236A597F5.MAI] Message Delivery
Failure.

Your message addressed to the target domain (ThisIsTheDomainThatIsNotOurs.com) could not be
delivered because the mail server responsible for this domain returned a
permanent error.

The server returned:

550 (our mailserver ip address) (our mailserver ip address) You have been permanently banned from
this domain

Message headers follow:

Received: from NameOfOurMailAccount ([212.50.96.118]) by easyconsole.com with MailEnable
ESMTP; Tue, 26 Mar 2013 10:41:00 +0200
From: "NameAndSurname" <Username@OurDomain.com>
To: "'TheirNameAndSurname'" <TheirUsername@TheirDomain.com>,
"TheirNameAndSurname2'" <TheirUsername2@TheirDomain.com>
References:
<A7294A7B14E7334CAC3C98E9BA8598C5B7579F@someName.TheirDomain.com.local>
In-Reply-To:
<A7294A7B14E7334CAC3C98E9BA8598C5B7579F@someName.TheirDomain.com.local>
Subject: Bla Bla
Date: Tue, 26 Mar 2013 10:40:48 +0200
Organization: SomeOrganization
Message-ID: <003f01ce29fd$9da39050$d8eab0f0$@Name@OurDomain.com>
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_0040_01CE2A0E.612C6050"
X-Mailer: Microsoft Office Outlook 12.0
Thread-Index: Ac4nCK4W/U3V5dLJRSSHLTKVdoE5FAC81JUg
Content-Language: en-ca
X-ME-Bayesian: 0.000000

[MailEnable-Ian]

Hi,

What is reported within the SMTP log files? Is there any URL so you can check the reasoning behind the blacklisting?