The IESG has approved the following document: - 'Sieve Email Filtering: Detecting Duplicate Deliveries' (draft-ietf-appsawg-sieve-duplicate-09.txt) as Proposed Standard This document is the product of the Applications Area Working Group. The IESG contact persons are Barry Leiba and Pete Resnick. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-appsawg-sieve-duplicate/ Technical Summary This document defines a new test command "duplicate" for the "Sieve" email filtering language. This test adds the ability to detect duplications. The main application for this new test is handling duplicate deliveries commonly caused by mailing list subscriptions or redirected mail addresses. The detection is normally performed by matching the message ID to an internal list of message IDs from previously delivered messages. For more complex applications, the "duplicate" test can also use the content of a specific header or other parts of the message. Review and Consensus The document was discussed by a few participants within the Applications Area Working Group and it has the consensus of the working group. The document was also discussed on the Sieve mailing list, <sieve@ietf.org>. There are at least two implementations of this extension. Reviews have been done at various times by several active Sieve participants and implementors. IETF last call resulted in just one minor point, from the ops-dir review. Personnel Document Shepherd: Ned Freed <ned.freed@mrochek.com> Responsible Area Director: Barry Leiba < barryleiba@computer.org>
