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outbound emails rejected by 2 companies

We have an Exchange 2007 Server having issues sending outbound to 2 companies.  Our server passes email to a Barracuda 300 through a smarthost, which scans for content and virus.  We are clean on mxtoolbox, SPF record in place RDNS in place, etc.

The rejection emails have  a vague 554 error.  they are at large companies, so it is difficlult to get to a person who can whitelist us or discuss the issue.  The NDRs don't  specify any particular problem.  Here is a cleaned bounce back:

Sent: Monday, February 22, 2010 3:26 PM
Subject: Undeliverable: Invoice
Delivery has failed to these recipients or distribution lists:
An error occurred while trying to deliver this message to the recipient's e-mail address. Microsoft Exchange will not try to redeliver this message for you. Please try resending this message, or provide the following diagnostic text to your system administrator.
Diagnostic information for administrators:
Generating server:
#< #5.0.0 X-Spam-&-Virus-Firewall; host[] said: 554 Transaction Failed Spam Message not queued. (in reply to end of DATA command)> #SMTP#
Original message headers:
X-ASG-Debug-ID: 1266873952-72c06daa0001-fMal01
Received: from ([]) by with ESMTP
 id D5aMrxUNJd65MIAf for <>; Mon, 22 Feb 2010 15:25:52
 -0600 (CST)
Received: from ([]) by
 ([]) with mapi; Mon, 22 Feb 2010 15:25:51 -0600
From: Sender<>
To: user1 <>
Date: Mon, 22 Feb 2010 15:25:51 -0600
X-ASG-Orig-Subj: RE: Invoice
Subject: RE: Invoice
Thread-Topic: Invoice
Thread-Index: Acq0BW5fVNmKA6ZqQcuHvWUnJqcVDgAAApAg
Message-ID: <>
References: <>
In-Reply-To: <>
Accept-Language: en-US
Content-Language: en-US
acceptlanguage: en-US
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Barracuda-Connect: UNKNOWN[]
X-Barracuda-Start-Time: 1266873952
X-Virus-Scanned: by bsmtpd at

Avatar of Alan Hardisty
Alan Hardisty
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Please read through my EE Article on problems sending mail to one or more specific domains as someting may be wrong, although I suspect that all is well and you are being blocked incorrectly. - Currently unavailable, but also available at
If you want to send me a test message to alan @ my spam software will reject you if you are not setup properly in any way.  If it gets through, then you are either being filtered by content or by IP incorrectly.
Avatar of mathews2001


I sent a test email.
Thanks - will see what my server makes of it and come back to you shortly.  It will get greylisted initially.
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Alan Hardisty
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thanks for your quick response and help.  Sometimes you just need another person to confirm what you are thinking.
No problems - sorry it is not a more exciting answer, but sometimes, that's just the way it is.
Appreciate the points and good luck resolving it.  If you need to come back for further help - please do.
I believe the companies rejecting us use Mcafee products and we are on a proprietary Mcafee black list.
Nice - how did you manage to work that one out?