Network Working Group Ken Murchison Document: draft-murchison-sieve-subaddress-00.txt Oceana Matrix Ltd. Expires September 18, 2000 13 March 2000 Sieve -- Subaddress Extension Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt To view the list Internet-Draft Shadow Directories, see http://www.ietf.org/shadow.html. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society 2000. All Rights Reserved. Abstract On e-mail systems that allow for "detailed" or "subaddressing" (i.e., the "foo" in the address "me+foo@company.com"), it is desirable to make comparisons against these subaddresses. This draft defines an extension to the Sieve mail filtering language that allows users to compare against the user and detail parts of an address. Expires September 18, 2000 Murchison [Page 1]
Internet Draft Sieve -- Subaddress Extension March 13, 2000 Table of Contents Status of this Memo . . . . . . . . . . . . . . . . . . . . . . . . 1 Copyright Notice . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Abstract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0. Meta-information on this draft . . . . . . . . . . . . . . . 3 0.1. Discussion . . . . . . . . . . . . . . . . . . . . . . . . . 3 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Capability Identifier . . . . . . . . . . . . . . . . . . . . 3 3. Subaddress Comparisons . . . . . . . . . . . . . . . . . . . 3 4. Security Considerations . . . . . . . . . . . . . . . . . . . 4 5. Author's Address . . . . . . . . . . . . . . . . . . . . . . 4 Appendix A. References . . . . . . . . . . . . . . . . . . . . . . 4 Appendix B. Full Copyright Statement . . . . . . . . . . . . . . . 5 Expires September 18, 2000 Murchison [Page 2]
Internet Draft Sieve -- Subaddress Extension March 13, 2000 0. Meta-information on this draft This information is intended to facilitate discussion. It will be removed when this document leaves the Internet-Draft stage. 0.1. Discussion This draft is intended to be an extension to the Sieve mail filtering language, available from the Internet-Drafts repository as <ftp://ftp.ietf.org/internet-drafts/draft-showalter-sieve-09.txt> (where 09 is the version number, which is actually currently 09). This draft and the Sieve language itself are being discussed on the MTA Filters mailing list at <ietf-mta-filters@imc.org>. Subscription requests can be sent to <ietf-mta-filters-request@imc.org> (send an email message with the word "subscribe" in the body). More information on the mailing list along with a WWW archive of back messages is available at <http://www.imc.org/ietf-mta-filters/>. 1. Introduction This is an extension to the Sieve language defined by [SIEVE] for comparing against the user and detail parts of an address. Conventions for notations are as in [SIEVE] section 1.1, including use of [KEYWORDS]. 2. Capability Identifier The capability string associated with the extension defined in this document is "subaddress". 3. Subaddress Comparisons Commands that act exclusively on addresses may take the optional tagged arguments ":user" and ":detail" to specify what part of the left-side of the address will be acted upon. The ":user" argument specifies that part of the address which lies to the left of the "+" (i.e., the "me" in "me+foo@company.com"). If no "+" exists, then ":user" specifies the entire left-side of the address (equivalent to ":localpart"). Expires September 18, 2000 Murchison [Page 3]
Internet Draft Sieve -- Subaddress Extension March 13, 2000 The ":detail" argument specifies that part of the address which lies to the right of the "+" (i.e., the "foo" in "me+foo@company.com"). If no "+" exists, or nothing lies to the right of the "+", then ":detail" ":is" the null key (""). The ":user" and ":detail" address parts are subject to the same rules and restrictions as the standard address parts defined in [SIEVE]. Example: require "subaddress"; # If a message is not to me (ignoring +detail), junk it. if not allof (address :user ["to", "cc", "bcc"] "me", address :domain ["to", "cc", "bcc"] "company.com") { discard; } # Redirect all mail sent to +foo. if address :detail ["to", "cc", "bcc"] "foo" { redirect "foo@bar.org"; } 4. Security Considerations Security considerations are discussed in [SIEVE]. It is believed that this extension doesn't introduce any additional security concerns. 5. Author's Address Ken Murchison Oceana Matrix Ltd. 21 Princeton Place Orchard Park, NY 14127 Phone: (716) 662-8973 EMail: ken@oceana.com Appendix A. References [KEYWORDS] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", Harvard University, RFC 2119, March, 1997. Expires September 18, 2000 Murchison [Page 4]
Internet Draft Sieve -- Subaddress Extension March 13, 2000 [SIEVE] Showalter, T., "Sieve: A Mail Filtering Language", Mira- point, Inc., Work In Progress. Appendix B. Full Copyright Statement Copyright (C) The Internet Society 2000. All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of develop- ing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Expires September 18, 2000 Murchison [Page 5]
