On Wed, 29 Feb 2012, Nicolas wrote:
Mark,
Version of Amavis: 2.6.4
Here is an example mail (from mailbox spam user):
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From [email protected] Wed Feb 29 14:19:22 2012
Return-Path: <[email protected]>
X-Original-To: spam@mtaXX
Delivered-To: spam@mtaXX
Received: from localhost (localhost [127.0.0.1])
by mtaXX (Postfix) with ESMTP id 08EAB80AI3
for <spam@mtaXX>; Wed, 29 Feb 2012
X-Envelope-From: <[email protected]>
X-Envelope-To: <joe@XXXXX>
X-Envelope-To-Blocked: <joe@XXX>
X-Quarantine-ID: <BNXmyCre+d9B>
X-Spam-Flag: YES
X-Spam-Score: 19.461
X-Spam-Level: *******************
X-Spam-Status: Yes, score=19.461 tag=2 tag2=5.31 kill=6.31
tests=[ALL_TRUSTED=-1, DRUGS_ERECTILE=2.221, DRUG_ED_CAPS=1.023,
FB_CIALIS_LEO3=3.055, MISSING_SUBJECT=1.767, NO_PRESCRIPTION=1.102,
ONLINE_PHARMACY=2.371, TVD_VISIT_PHARMA=1.196, URIBL_BLACK=1.775,
URIBL_DBL_SPAM=1.7, URIBL_JP_SURBL=1.948, URIBL_SBL=0.644,
URIBL_WS_SURBL=1.659] autolearn=spam
Received: from mtaXX ([127.0.0.1])
by localhost (mtaXX [127.0.0.1]) (amavisd-new, port 10024)
with ESMTP id BNXmyCre+d9B for <joe@XXX>;
Wed, 29 Feb 2012
Received: from pp (localhost [127.0.0.1])
by mtaXX (Postfix) with SMTP id 6BF6480A48
for <joe@XXX>; Wed, 29 Feb 2012
Message-Id: <20120229171911.6BF6480A48@mtaXX>
Date: Wed, 29 Feb 2012
From: [email protected]
To: undisclosed-recipients:;.
.
.
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Note the content of "To:"not match with X-Envelope-To: (original final
recipient)
The "To:" header and the envelope reicipient (shown in that X-Envelope-To:
header) are two different things. SMTP delivers mail to the envelope
recipient. There is no requirement that the envelope recipient be in the
To: header (it could be in the CC: header or could be a BCC: recipient).
For the most part, the To: and CC: headers are just part of the message
data as far as SMTP is concerned. SMTP does not make mail delivery
decisions based on To: or CC: headers and only in very limited
circumstances does an SMTP server add or change message headers.
Some mail software, when not finding a To: header, adds the To:
undisclosed-recipients:; header you're seeing (one of the limited
circumstances where an SMTP server might add a message header). It just
means that there was no To: header or that it was blank. Mail without a
To: header is almost always spam.
-- Larry Stone
[email protected]
