Re: [sieve] I-D Action: draft-ietf-sieve-imap-sieve-08.txt
Stephan Bosch <stephan@rename-it.nl> Tue, 11 September 2012 08:52 UTC
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Date: Tue, 11 Sep 2012 10:51:27 +0200
From: Stephan Bosch <stephan@rename-it.nl>
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Cc: Barry Leiba <barryleiba@computer.org>
Subject: Re: [sieve] I-D Action: draft-ietf-sieve-imap-sieve-08.txt
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On 9/10/2012 11:16 PM, internet-drafts@ietf.org wrote: > A New Internet-Draft is available from the on-line Internet-Drafts directories. > This draft is a work item of the Sieve Mail Filtering Language Working Group of the IETF. > > Title : Support for Internet Message Access Protocol (IMAP) Events in Sieve > Author(s) : Barry Leiba > Filename : draft-ietf-sieve-imap-sieve-08.txt > Pages : 23 > Date : 2012-09-10 > > Abstract: > Sieve defines an email filtering language that can, in principle, > plug into any point in the processing of an email message. As > defined in the base specification, it plugs into mail delivery. This > document defines how Sieve can plug into points in the IMAP protocol > where messages are created or changed, adding the option of user- > defined or installation-defined filtering (or, with Sieve extensions, > features such as notifications). Because this requires future Sieve > extensions to specify their interactions with this one, this document > updates the base Sieve specification, RFC 5228. There is no changelog in the document, so I wondered what changed and therefore I read it again. Rather than finding out what had changed, I noticed a few other things: #1) The final paragraph of Section 2.1 lists a few IMAP and Sieve capabilities for which support is required: IMAP "METADATA" and Sieve "environment". I would expect this Section to list all such dependencies, but apparently it does not. Section 3.8 adds the Sieve imap4flags extension as a requirement. Yet, section 4.5 suggests that it is optional again. So what is it? #2) Section 2.2.2 suggests that there is a MULTIAPPEND command for IMAP. There is no such thing: it is an IMAP capability that extends APPEND to accept multiple messages at once. I would merge this with the previous section: -- 2.2.1. The IMAP APPEND Command A message may be added to a mailbox through the IMAP APPEND command. In a server that advertises "imapsieve", new messages added in this way MUST trigger the execution of a Sieve script, subject to the settings defined through Metadata (see Section 2.3.1). If the IMAP server supports the IMAP MultiAppend extension [RFC3502], multiple messages may be added to a mailbox through a single APPEND command. In a server that advertises "imapsieve", new messages added in this way MUST each individually trigger the execution of a Sieve script. -- This also stresses the fact that each individual message triggers the Sieve script. At other places in the document MULTIAPPEND is listed as a separate command, but there it would suffice to just remove it. I also gave the issue of useless script triggers, i.e. events that are never of interest for the script involved, some more thought. For example, I would hate to have my Sieve script executed for each message that I read (added \Seen flag) while it doesn't do anything useful with that event. Wouldn't it be useful to have a `/shared/imapsieve/cause' Metadata item that indicates which causes (the items from Section 7.3.1 in a space-separated list) should trigger the Sieve script? More detailed control could be used to select specific flags that are relevant (e.g. in a '/share/imapsieve/changedflags' Metatada item). Regards, Stephan.
- [sieve] I-D Action: draft-ietf-sieve-imap-sieve-0… internet-drafts
- Re: [sieve] I-D Action: draft-ietf-sieve-imap-sie… Stephan Bosch
- Re: [sieve] I-D Action: draft-ietf-sieve-imap-sie… Barry Leiba
- Re: [sieve] I-D Action: draft-ietf-sieve-imap-sie… Stephan Bosch
- Re: [sieve] I-D Action: draft-ietf-sieve-imap-sie… Barry Leiba
- Re: [sieve] I-D Action: draft-ietf-sieve-imap-sie… Aaron Stone
- Re: [sieve] I-D Action: draft-ietf-sieve-imap-sie… NED+mta-filters
- Re: [sieve] I-D Action: draft-ietf-sieve-imap-sie… NED+mta-filters
- Re: [sieve] I-D Action: draft-ietf-sieve-imap-sie… Stephan Bosch
- Re: [sieve] I-D Action: draft-ietf-sieve-imap-sie… Barry Leiba