marf K. Li
Internet-Draft B. Leiba
Intended status: Standards Track Huawei Technologies
Expires: November 14, 2011 May 13, 2011
Email Feedback Report Type Value : not-spam
draft-li-marf-not-spam-feedback-00
Abstract
This document defines a new Abuse Reporting Format (ARF) feedback
report type value: "not-spam". It can be used to indicate that a
message that was tagged or categorized as spam (such as by an ISP) in
fact is not spam.
Status of this Memo
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This Internet-Draft will expire on November 14, 2011.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Discussion . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Feedback Report Type: Not-Spam . . . . . . . . . . . . . . . 3
3. Example . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Security Considerations . . . . . . . . . . . . . . . . . . . 6
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 6
7.1. Normative References . . . . . . . . . . . . . . . . . . . . 6
7.2. Informative References . . . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . 7
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1. Introduction
In [RFC5965], an Abuse Reporting Format (ARF) is defined for
reporting email abuse. Currently two feedback report types are
defined that are related to the spam problem, and that can be used to
report abusive or fraudulent email messages:
o abuse: indicates unsolicited email or some other kind of email
abuse.
o fraud: indicates some kind of fraud or phishing activity.
This specification defines a new feedback report type: "not-spam".
It can be used to report a message that was mistakenly marked as
spam.
1.1. Discussion
The requirement to indicate a not-spam report type is from the Open
Mobile Alliance (OMA) Spam Report Requirement Document
[OMA-SpamRep-RD].
In some cases, the mail client receives an email message that was
tagged as spam, either by the mail system or accidentally by the
user, but the end user finds out that actually it is not spam. The
mail client accepts the end user's report instruction and retrieves
information related to the message, and reports this email as not-
spam to the mail operator. When the mail operator receives the
report, it can take appropriate measures with the mail in the message
store. For example, it can remove the spam tag or change the
category, possibly preventing future similar mail from being marked
as spam. The report can be used to adjust the training of an
automated classifier. After processing the report, the mail operator
can send a notification to the mail client about the processing
result.
1.2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119]. These
terms take their normative values only when presented in UPPER CASE.
2. Feedback Report Type: Not-Spam
This document only defines a new feedback report type, "not-spam",
extending feedback reports as specified in [RFC5965].
In the first MIME part of the feedback report message, the end user
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or the mail client MAY add information to indicate why the message is
not spam -- for example, because the originator or its domain is well
known.
3. Example
In the example, Joe, a pharmaceuticals sales representative, has
received a message about discount pharmaceuticals. Because that is a
frequent subject of spam email, the message has been marked as spam
-- incorrectly, in this case. Joe has reported it as "not-spam", and
this is an example of the report.
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From: <abusedesk@example.com>
Date: Thu, 8 Mar 2005 17:40:36 EDT
Subject: FW: Discount on pharmaceuticals
To: <abuse@example.net>
MIME-Version: 1.0
Content-Type: multipart/report; report-type=feedback-report;
boundary="part1_13d.2e68ed54_boundary"
--part1_13d.2e68ed54_boundary
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
This is an email abuse report for an email message received
from IP 192.0.2.1 on Thu, 8 Mar 2005 14:00:00 EDT.
For more information about this format please see
http://www.mipassoc.org/arf/.
--part1_13d.2e68ed54_boundary
Content-Type: message/feedback-report
Feedback-Type: not-spam
User-Agent: SomeGenerator/1.0
Version: 1
--part1_13d.2e68ed54_boundary
Content-Type: message/rfc822
Content-Disposition: inline
Received: from mailserver.example.net
(mailserver.example.net [192.0.2.1])
by example.com with ESMTP id M63d4137594e46;
Thu, 08 Mar 2005 14:00:00 -0400
From: <someone@example.net>
To: <Undisclosed Recipients>
Subject: Discount on pharmaceuticals
MIME-Version: 1.0
Content-type: text/plain
Message-ID: 8787KJKJ3K4J3K4J3K4J3.mail@example.net
Date: Thu, 02 Sep 2004 12:31:03 -0500
Hi, Joe. I got a lead on a source for discounts on
pharmaceuticals, and I thought you might be interested.
[...etc...]
--part1_13d.2e68ed54_boundary--
Example 1: Not-spam report
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4. Security Considerations
All of the Security Considerations from [RFC5965] are inherited here.
Not-spam reports could possibly be used in an attack on a filtering
system, reporting true spam as "not-spam". Even in absence of
malice, some not-spam reports will only apply to the user sending the
report. Operators need to be careful in trusting such reports,
beyond their applicability to the specific user in question.
5. IANA Considerations
Registration is requested for the newly defined feedback type name:
"not-spam", according to the instructions in section 7.3 of the base
specification [RFC5965].
Please add the following to the "Feedback Report Type Values"
registry:
Feedback Type Name: not-spam
Description: Indicates that a message is not spam. This may be used
to correct a message that was incorrectly tagged or categorized
as spam.
Published in: this document
Status: current
6. Acknowledgements
The authors would like thank Murray S. Kucherawy and Bert
Greevenbosch for their discussion and review.
7. References
7.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC5965] Shafranovich, Y., Levine, J., and M. Kucherawy, "An
Extensible Format for Email Feedback Reports", RFC 5965,
August 2010.
7.2. Informative References
[OMA-SpamRep-RD]
Open Mobile Alliance, "Mobile Spam Reporting
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Requirements", OMA-RD-SpamRep-V1_0 20101123-C,
November 2010.
Authors' Addresses
Kepeng Li
Huawei Technologies
Huawei Base, Bantian, Longgang District
Shenzhen, Guangdong 518129
P. R. China
Phone: +86-755-28974289
Email: likepeng@huawei.com
Barry Leiba
Huawei Technologies
Phone: +1 646 827 0648
Email: barryleiba@computer.org
URI: http://internetmessagingtechnology.org/
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