I have a ZCS FOSS 8.0 installation and all read recipts are being marked as spam and discarded even if sent from same domain and using web interface.
Here is an extract of a report:
Content type: Spam
Internal reference code for the message is 11179-03/gTA8dQcaUhtB
First upstream SMTP client IP address: [ip] email.domain.com
According to a 'Received:' trace, the message apparently originated at:
[ip], email.domain.com email.domain.com [ip]
From: Paul <firstname.lastname@example.org>
Message-ID: <2134323784.42666.1350982169211.JavaMail.root@emai l.domain.com>
Subject: Read-Receipt: Re: My Message
The message has been quarantined as: spam-gTA8dQcaUhtB.gz
The message WAS NOT relayed to:
250 2.7.0 Ok, discarded, id=11179-03 - spam
Spam scanner report:
Return-Path: <> Received: from email.domain.com (email.domain.com [ip]) by email.domain.com (Postfix) with ESMTP id 35A332001B3 for ; Tue, 23 Oct 2012 10:49:29 +0200 (CEST) Date: Tue, 23 Oct 2012 10:49:29 +0200 (CEST) From: Paul To: Admin Message-ID: <2134323784.42666.1350982169211.JavaMail.root@emai l.domain.com> Subject: Read-Receipt: Re: My Message MIME-Version: 1.0 Content-Type: multipart/report; boundary="----=_Part_42664_239165691.1350982169210"; report-type=disposition-notification Auto-Submitted: auto-replied (zimbra; read-receipt) Precedence: bulk
I don't have any custom spam rules and I didn't change anything in the backend.