Mails aus dem eigenen Netz werden als Bulkmail erkannt?!

[altariq]

Hallo zusammen,

brauch mal eure Hilfe. Unser neu aufgesetzter Server erkennt manche Emails die aus dem eigenen Netz von der Warenwirtschaft automatisch verschickt werden, als Spam.

Es arbeitet hier ein Postfix als MTA. Der sendet weiter an amavisd.

Kann einer von euch erkennen, wo hier der Fehler liegen könnte?

Hier mal ein Auszug:

Fw: Considered UNSOLICITED BULK EMAIL, apparently from you

---- Original Message -----

From: "Content-filter at Groupware.domain1.de"

<postmaster@Groupware.domain1.de>

To: <online@domain1.de>

Sent: Friday, January 11, 2008 10:21 AM

Subject: Considered UNSOLICITED BULK EMAIL, apparently from you

> A message from <online@domain1.de> to:

> -> user2@domain2.de

>

> was considered unsolicited bulk e-mail (UBE).

>

> Our internal reference code for your message is 02074-19/4IfNnbLANHv5

>

> The message carried your return address, so it was either a genuine mail

> from you, or a sender address was faked and your e-mail address abused

> by third party, in which case we apologize for undesired notification.

>

> We do try to minimize backscatter for more prominent cases of UBE and

> for infected mail, but for less obvious cases of UBE some balance

> between losing genuine mail and sending undesired backscatter is sought,

> and there can be some collateral damage on both sides.

>

> According to a 'Received:' trace, the message originated at: [192.1.1.70],

> 192.1.1.190 (unknown [192.1.1.70])

>

> Return-Path: <online@domain1.de>

> Message-ID: <V5.0004764705@domain1.de>

> Subject: DMS-Statusmail

>

> Delivery of the email was stopped!

>

--------------------------------------------------------------------------------

> Return-Path: <online@domain1.de>

> Received: from 192.1.1.190 (unknown [192.1.1.70])

> by domain.de (Postfix) with SMTP id 64759B8839

> for <user2@domain1.de>; Fri, 11 Jan 2008 10:21:38 +0100 (CET)

> Message-ID: <V5.0004764705@domain.de>

> From: <online@domain1.de>

> To: "'user2@domain2.de'" <user2@domain2.de>

> Subject: DMS-Statusmail

> Date: Fri, 11 Jan 2008 10:24:00 +0100

> MIME-Version: 1.0

> Content-Type: text/plain; charset=us-ascii

> Content-Transfer-Encoding: 7bit